Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA astronaut and Expedition 74 flight engineer Jessica Meir configures research gear inside the Destiny laboratory module’s Microgravity Science Glovebox aboard the International Space Station.
Credit: NASA/Jessica Meir
Students in New York will hear from NASA astronaut Jessica Meir as she answers their prerecorded science, technology, engineering, and mathematics (STEM) questions while aboard the International Space Station.
The Earth-to-space call will begin at 11:05 p.m. EDT Thursday, May 28, and will stream live on the agency’s Learn With NASA YouTube channel.
This event is hosted by the Cradle of Aviation Museum in Garden City, New York, for students in grades K-12 and members of the community. This unique opportunity aims to deepen understanding of space exploration and enhance awareness of STEM careers.
Media interested in covering the event must RSVP no later than 5 p.m. EDT, Wednesday, May 27, to Jerelyn Zontini at: 516-567-0537 or jzontini@cradleofaviation.org.
For more than 25 years, astronauts have continuously lived and worked aboard the space station, testing technologies, performing science, and developing skills needed to explore farther from Earth. Astronauts communicate with NASA’s Mission Control Center in Houston 24 hours a day through SCaN’s (Space Communications and Navigation) Near Space Network.
Research and technology investigations taking place aboard the space station benefit people on Earth and lay the groundwork for other agency deep space missions. As part of NASA’s Artemis program, the agency will send astronauts to the Moon to prepare for future human exploration of Mars, inspiring the world through discovery in a new Golden Age of innovation and exploration.
For more information on NASA in-flight calls, visit:
During a Moon Base event Tuesday at NASA’s Headquarters in Washington, the agency announced new contracts for lunar rovers for crew to drive and uncrewed cargo landers bound for the Moon. NASA leaders also shared target launch timeframes and upcoming milestones for the first Moon Base infrastructure and exploration missions to the lunar South Pole region ahead of Artemis astronaut landings.
“The Moon Base will be America’s and humanity’s first outpost on another celestial world,” said NASA Administrator Jared Isaacman. “Every mission, crewed and uncrewed, will be a learning opportunity as we return to the lunar surface, build the infrastructure to stay, and master the skills required to live and operate in one of the most demanding and dangerous environments imaginable. We will go for the science, for all we stand to gain from an economic and technological perspective, for the innovations that will make life better here on Earth, and to prepare for where we will inevitably go next. We are grateful for President Trump’s leadership, the bipartisan commitment from Congress, our industry and international partners, and the dedicated NASA workforce whose expertise enables us to achieve the near-impossible.”
NASA announced the first three Moon Base missions to begin building sustained operations:
Moon Base I: Targeted for launch no earlier than fall 2026, this mission will use Blue Origin’s Blue Moon Mark 1 Endurance lander to deliver NASA payloads. Equipment will include the Stereo Cameras for Lunar Plume-Surface Studies instrument to study how thrusters interact with the Moon’s surface, and the Laser Retroreflective Array, which helps orbiting spacecraft determine a more precise location using reflected laser light. The mission will land on the Shackleton Connecting Ridge to demonstrate capabilities that reduce risk for future crewed Artemis landing missions in 2028.
Moon Base II: Planned for launch later this year, this mission will deliver more than 1,100 pounds of cargo on Astrobotic’s Griffin lander, including Astrolab’s FLIP rover, to mature mobility systems that inform future lunar terrain vehicle, or LTV, operations.
Moon Base III: Also targeted for this year, this mission will fly the first payload selected through NASA’s Payloads and Research Investigations on the Surface of the Moon initiative. Its anchor investigation, Lunar Vertex, will fly on Intuitive Machine’s Nova-C Trinity lunar lander and study lunar swirls, or light spots on the surface of the Moon, to improve understanding of surface evolution and material behavior under extreme conditions. The mission will include payloads from ESA (European Space Agency) and the Korea Astronomy and Space Science Institute, reflecting commercial and international participation in Moon Base activities.
These missions are the first of more than a dozen missions that will be announced this year, each designed to generate operational data and reduce risk ahead of crewed Artemis surface activities.
NASA has awarded Astrolab $219 million and Lunar Outpost $220 million to build and deliver the first phase of LTVs. Awarded under the Phase 1 High Achievability Mission task orders of the Lunar Terrain Vehicle Services contract, these firm-fixed-price, performance-based milestones will enable NASA to deploy crewed and uncrewed mobility systems to the lunar surface by 2028 through the agency’s CLPS (Commercial Lunar Payload Services) initiative. Early surface mobility is a foundational component of the national space policy priority to create an enduring lunar presence.
Astrolab’s Crewed Lunar Vehicle, or CLV‑1, adapted from the company’s FLEX architecture, is a crewed rover designed to transport astronauts, carry supplies, and support remote operations, with a compact stowed configuration, a mass of about 2,000 pounds, and the ability to reach more than 6 mph on level terrain.
Complementing this capability, Lunar Outpost’s Pegasus is a lighter, mission‑ready evolution of its Eagle rover designed explicitly to meet NASA’s updated LTV requirements. Operational for up to a year and capable of manual, autonomous, or teleoperated driving at speeds more than 9 mph, Pegasus incorporates Apollo‑heritage technologies and builds on prototype and flight experience to deliver human‑centered mobility essential for establishing a sustained Moon Base.
Deploying multiple LTVs early in Moon Base development will accelerate technology demonstrations, inform site planning, and reduce operational risk ahead of crewed Artemis missions, enabling NASA to characterize terrain hazards, move materials, pre-stage resources, and mature systems needed for long-duration lunar exploration.
Over the next 18 months, the selected providers will finalize rover designs, conduct crewed evaluations, and qualify flight units for operational readiness, with the resulting LTVs supporting autonomous traverses, terrain preparation, scientific investigations, technology demonstrations, and astronaut transport.
As Moon Base efforts advance, NASA will expand opportunities for additional vendors through on‑ramp competitions, fostering a robust, sustainable approach to lunar mobility and strengthening national priorities in space capability.
To deliver these rovers to the Moon’s South Pole region, NASA awarded Blue Origin $188 million with an option period worth $280.4 million for two task orders, which includes an option period based on initial phase performance. NASA can choose to extend the task order for payload delivery.
This competitive procurement, executed under the CLPS 1.0 indefinite-delivery/indefinite-quantity framework, the CX-2 task order represents a strategic investment in lunar exploration and will play a critical role in enabling mobility and infrastructure development for sustained lunar operations, marking a significant step toward establishing a permanent human presence on the Moon.
Building on the successes and lessons learned from CLPS 1.0, the agency also outlined how the next generation of cargo landers under CLPS 2.0 will continue to deliver payloads to the lunar surface and lunar orbit, supporting NASA’s ambitious goals for sustained lunar operations. This next phase introduces enhanced flexibility, allowing NASA to order turn-key delivery services or start accepting delivery of CLPS hardware for integration into its own missions. The final CLPS 2.0 request for proposal was released on May 15, with responses due on Tuesday, June 30.
Moonfall update
The agency also shared new updates on MoonFall, a mission that will send four drones to fly short hops on the lunar surface as they survey potential landing sites for Artemis astronauts. NASA‘s Jet Propulsion Laboratory in Southern California has been developing the design and testing prototype hardware and has selected Firefly Aerospace to build the spacecraft that will transport the drones from Earth orbit to the Moon. Launch is targeted for 2028.
The drones will independently land on the lunar surface and then gather high-resolution imagery of hard-to-reach terrain over the course of a single lunar day. After each drone’s final flight, its survive-the-night payload will continue to operate for several months, marking a sustained U.S. presence at the lunar South Pole.
More robotic missions to come
Finally, NASA stated in the coming weeks that a selection of additional CLPS 1.0 task awards, issued during the agency’s Ignition event, for Moon Base payloads and technology demonstrations, is forthcoming. In the coming months, there also will be additional opportunities to compete for CLPS 1.0 and 2.0 task orders as Phase 1 technology demonstrations are defined and planned for Moon Base missions.
During the update, NASA leadership reiterated that establishing a sustained lunar presence is aligned with the agency’s broader exploration strategy, supported by increased launch cadence, expanded industry partnerships, and agencywide coordination.
As part of the Golden Age of innovation and exploration, NASA will send astronauts on increasingly difficult missions to explore more of the Moon for scientific discovery, economic benefits, and to build on our foundation for the first crewed missions to Mars.
Chennai, on India’s southern coast along the Bay of Bengal and with a metropolitan population of about 8.7 million, shines with white LED streetlights in this photograph taken at approximately 9:13 p.m. local time on May 2, 2026, from the International Space Station.
Earth observations from the space station let us see how our planet changes over time. In combination with NASA-developed technologies, these observations provide the foundation needed to explore and sustain human life on the Moon, Mars, and beyond.
Signs of the racetrack where an early “Decoration Day” event was held are still visible in this image captured by the OLI (Operational Land Imager) on Landsat 9 on April 24, 2026.
NASA Earth Observatory/Michala Garrison
The origins of Memorial Day lie in the U.S. Civil War, a conflict that led to the deaths of nearly 700,000 Americans. By the waning days of the war, makeshift military cemeteries had sprung up throughout the country, but especially in the South and Mid-Atlantic, where much of the fighting occurred.
By the time the leader of the veterans’ group Grand Army of the Republic declared May 30, 1868, as “Decoration Day”—a day for “strewing with flowers or otherwise decorating the graves of comrades who died in the defense of their country”—informal memorials and commemorative events were already happening.
The U.S. Department of Veterans Affairs notes that at least 25 places played a role in the early years of the holiday, including Columbus, Mississippi; Macon, Georgia; Columbus, Georgia; Richmond, Virginia; Boalsburg, Pennsylvania; and Carbondale, Illinois.
One of the earliest and largest ceremonies documented by historians occurred in Charleston, South Carolina. Confederate control of the badly damaged city had ended in February 1865, and Union troops had emancipated thousands of people there. Among the first tasks taken on was ensuring a proper burial for 257 soldiers found in mass graves near a racetrack at the Washington Race Course and Jockey Club, which had been used as a prison camp during the war.
After these soldiers had been re-interred in a new cemetery nearby, a crowd of roughly 10,000 people, including freedmen, missionaries, teachers, and soldiers, assembled at the racetrack and held a parade on May 1, 1865. The day featured thousands of schoolchildren carrying armloads of roses, women bearing flowers and wreaths, double-time marches by troops, choir performances of the “Star-Spangled Banner,” and Bible recitations by local ministers.
Much has changed in Charleston since the Civil War. The city has been rebuilt, and it has grown from a pre-war population of 40,000 to 160,000 today. Yet signs of the racetrack in what is now Hampton Park, where the early memorial event took place, remain visible—even to a sensor orbiting Earth on Landsat 9 (above).
In 1968, the federal government declared Memorial Day an official national holiday with theUniform Monday Holiday Act, which moved Decoration Day celebrations from May 30 to the last Monday in May. This act followed a congressional resolution in 1966 that recognized a century of Memorial Day events in Waterloo, New York, acknowledging its claim as the “birthplace” of Memorial Day in honor of a commemorative event held there on May 5, 1866.
Hampton Park is visible just north of downtown Charleston in this image captured by the OLI (Operational Land Imager) on Landsat 9 on April 24, 2026.
NASA Earth Observatory/Michala Garrison
NASA Earth Observatory images by Michala Garrison, using Landsat data from the U.S. Geological Survey.Story by Adam Voiland.
As NASA pushes the boundaries of exploration and innovation for the benefit of humanity, the agency is looking for partners to share mission stories covering Artemis Moon missions, nuclear propulsion, aeronautics, and more.
NASA published an Announcement for Proposals on May 21 asking filmmakers, documentarians, songwriters, storytellers, poets, and others to submit proposals to partner with the agency by Tuesday, June 30.
In this initial round, NASA is seeking up to 10 partners for unfunded Space Act Agreements to share the stories behind, and insights into, multiple NASA missions, including, but not limited to, the following:
Artemis program, including the recently added Artemis III mission in 2027, and Artemis IV lunar landing in 2028, as well as plans for the agency to develop a Moon Base. Learn more about Artemis on the agency’s website.
NASA’s advancement of nuclear propulsion, including the Space Reactor-1 Freedom mission to Mars in 2028 carrying the Skyfall payload.
NASA’s cutting-edge aviation work through flight tests and other efforts.
While this opportunity is focused on U.S. creators, the agency will consider proposals with a minority of international participants. Proposals should detail which area of focus is desired, funding and distribution arrangements, and any specifics needs from NASA to move forward (access to facilities, personnel, etc.).
Full requirements and other details are available online:
Roscosmos cosmonaut Sergey Ryzhikov is pictured at the end of the European robotic arm as he works on a high‑resolution camera during a six‑hour, nine‑minute spacewalk outside the International Space Station on Oct. 16, 2025.
Credit: NASA
NASA will provide live coverage on Wednesday, May 27, as two Roscosmos cosmonauts conduct a spacewalk outside the International Space Station. The spacewalk is scheduled to begin at approximately 10:15 a.m. EDT and last roughly five hours.
Watch NASA’s live coverage beginning at 9:45 a.m. on NASA+, Amazon Prime, and the agency’s YouTube channel. Learn how to watch NASA content through a variety of online platforms, including social media.
International Space Station Expedition 74 commander Sergey Kud-Sverchkov and flight engineer Sergei Mikaev will install a solar radiation experiment on the Zvezda service module and remove other science hardware from the Poisk and Nauka modules of the orbiting complex’s Roscosmos segment. If time allows, the duo also will photograph one of the Progress 94 cargo spacecraft’s Kurs rendezvous antennas, which failed to deploy in March following its launch to the space station.
This Roscosmos spacewalk will be the second for Kud-Sverchkov and the first for Mikaev. Kud-Sverchkov will wear a spacesuit with red stripes, and Mikaev will wear a spacesuit with blue stripes. It will be the 279th spacewalk in support of space station assembly, maintenance, and upgrades.
To learn more about International Space Station research, operations, and its crews, visit:
ESA/Webb, NASA & CSA, A. Pedrini, A. Adamo (Stockholm University) and the FEAST JWST team
This near-infrared image released on May 6, 2026, shows a section of one of the spiral arms of Messier 51 (M51). M51 is one of four nearby galaxies observed by NASA’s James Webb Space Telescope in a study of nearly 9,000 star clusters.
Data from the study shows that more massive star clusters emerge more quickly from the clouds they are born in. Learning about star formation helps us understand galactic evolution, the dynamics within a galaxy, as well as how and where planets form.
Representatives of the Artemis Accords signatories including the United States, led by NASA and the U.S. Department of State, met May 13–14, 2026, in Lima for the fourth annual Artemis Accords workshop.
Credit: Ministry of Foreign Affairs of Peru and Peruvian Space Agency (CONIDA)
The United States participated in an Artemis Accords workshop in Lima, Peru, last week, following a new wave of nations committing to safe and responsible exploration of the Moon, Mars, and beyond.
Leading up to the event, six countries, including Latvia, Jordan, Morocco, Malta, Ireland, and Paraguay, joined the growing coalition of Artemis Accords signatories during ceremonies held at NASA Headquarters and abroad. This brings the total number of Artemis Accords signatories to 67 like-minded nations.
“This gathering showcases the remarkable global momentum behind the Artemis Accords and our Artemis program,” said NASA Administrator Jared Isaacman. “The Artemis Accords were created in President Trump’s first term and, as we execute his National Space Policy, we are putting these principles into practice. By aligning our capabilities, acting with urgency, and moving forward as partners, these signatory countries will help shape the future, not from the sidelines, but as essential contributors to humanity’s first permanent outpost on the Moon. Each and every Artemis Accords signatory has the opportunity to play a meaningful role with NASA as we work together to build a sustained human presence on the surface of the Moon.”
On May 13-14, representatives from NASA and the U.S. Department of State joined dozens of counterparts from 30 countries, including several of the newest signatories, for technical discussions and a tabletop exercise focused on operating in complex lunar environments.
Peru hosted the fourth annual workshop, marking the first time the gathering has taken place in South America.
“One of our objectives in hosting this edition of the workshops in our country was to increase regional participation,” said Maj. Gen. Roberto Melgar Sheen, director of Peruvian Space Agency (CONIDA). “I am pleased to say that we have achieved this: All South American signatory countries are taking part in this event, with 90% participating in person and 10% virtually.”
The Artemis Accords community reviewed planned lunar landing and orbiting missions from all the signatories in attendance. With more than a dozen lunar landing missions expected over the next 18 months, last week’s discussions and tabletop exercises focused on non-interference, interoperability, release of scientific data, orbital debris and mitigation. These conversations included a presentation on NASA’s exploration plan, which accelerates the agency’s missions to the Moon. Artemis Accords signatories now have expanded opportunities to support NASA’s Moon Base and deepen their participation in the broader Artemis program, following the agency’s Ignition event on March 24.
“Peru joined the Artemis Accords in 2024, aiming to participate in a cutting-edge dialogue mechanism that addresses global trends in space exploration. We aspire to forge cooperative ties with the signatories of the Artemis Accords that contribute to the scientific and aerospace development of our country,” said Peru’s Vice Minister of Foreign Affairs Ambassador Felix Denegri about the workshop.
During the first Trump Administration, the United States, led by NASA and the U.S. State Department, joined with seven other founding nations in 2020 to establish the Artemis Accords in response to the growing interest in lunar activities by both governments and private companies. Today, countries representing every region of the world have committed to responsible principles for exploration.
Signing the Artemis Accords means a commitment to the peaceful and transparent exploration of space; rendering aid to those in need; enabling access to scientific data; ensuring activities do not interfere with those of others; and preserving historically significant sites and artifacts by developing best practices.
More countries are expected to sign the Artemis Accords in the months and years ahead, as NASA continues its work to establish a safe, peaceful, and prosperous future in space.
For more information about the Artemis Accords, visit:
Two of the Artemis II CubeSats can be seen in the lower portion of the Orion stage adapter on the right side of the image.
NASA
Organizations interested in launching CubeSats on future Artemis missions should respond to NASA’s request for information (RFI) by Monday, June 1, for initial consideration.
“The SLS (Space Launch System) rocket and the Artemis missions provide great opportunities for teams to conduct important, science and technology investigations that contribute to the expansion of human space exploration,” said Courtney Ryals, acting manager, SLS payload integration, NASA’s Marshall Space Flight Center in Huntsville, Alabama.
The RFI will inform potential future opportunities for CubeSats to fly on Artemis III, IV and V. While NASA is reviewing specific mission profiles, the agency expects to accommodate 6U and 12U-sized CubeSats that would deploy in Earth orbit or on a heliocentric disposal trajectory following the separation of the Orion spacecraft from the rocket, as the nanosatellites would deploy from a ring on the upper stage of the rocket. Opportunities may also exist for CubeSats deployed on a reentry trajectory from Earth orbit.
CubeSat sizes are measured in “one unit” or “1U” increments, each measuring 10x10x10 centimeters.
NASA flew 10 CubeSats on the uncrewed Artemis I mission in 2022 and four on the crewed Artemis II mission, deploying each after the upper stage detached from the spacecraft and Orion was flying free on its own to carry out its primary mission. In addition to providing a ride to space as secondary payloads, the agency provides payload integration and engineering support.
As part of the Golden Age of innovation and exploration, NASA will send Artemis astronauts on increasingly difficult missions to explore more of the Moon for scientific discovery, economic benefits, establish an enduring human presence on the lunar surface, and to build on our foundation for the first crewed missions to Mars.
NASA’s AWE Completes Mission to Study Earth’s Effect on Space Weather
A long-exposure photo taken from the International Space Station shows airglow as bands of green and red curving around Earth. A flash of lightning appears near the bottom.
Credits: NASA
On May 21, ground controllers powered down NASA’s AWE (Atmospheric Waves Experiment) instrument, bringing the data collection phase of the mission to a successful and scheduled end, surpassing its planned two-year mission.
Installed on the exterior of the International Space Station since November 2023, AWE studied atmospheric gravity waves, which are giant ripples in the atmosphere caused by strong winds flowing over tall mountains or by violent weather events, such as tornadoes, thunderstorms, and hurricanes. The AWE instrument looked for these waves in colorful bands of light in Earth’s atmosphere, called airglow. Funded by NASA’s Heliophysics Division, AWE investigated how atmospheric gravity waves propagate upward to space and contribute to space weather — conditions in space that can disrupt satellites, as well as navigation and communications signals.
“The AWE mission has proven that our atmosphere is not a ceiling, but a living, breathing ocean in the sky,” said Joe Westlake, director of NASA’s Heliophysics Division at NASA Headquarters in Washington. “For the first time, we can see how a thunderstorm in the Midwest, a hurricane over Florida, or a wind gust over the Andes sends invisible ripples — atmospheric gravity waves — crashing into the edge of space like waves hitting a shoreline. By mapping these ripples from the International Space Station, we’ve discovered that Earth’s weather doesn’t just end at the clouds, instead it reaches out beyond our planet, shaping the space weather that impacts our orbital economy.”
This artist’s conception depicts the Atmospheric Waves Experiment (AWE) scanning the atmosphere from aboard the International Space Station, measuring variations in infrared airglow to track atmospheric gravity waves as they move up from the lower atmosphere into space.
Utah State University Space Dynamics Laboratory
During AWE’s 30-month residency on the station, the instrument captured four infrared images every second, tallying more than 80 million nighttime images, which is when airglow can be seen. It observed atmospheric gravity waves from numerous extreme weather events, including a tornado outbreak across the central U.S. in May 2024 and Hurricane Helene impacting the gulf coast of Florida in September 2024.
“We’ve seen atmospheric wave signatures associated with major terrestrial events, which provided a clear example of how intense weather systems can generate measurable upper-atmospheric responses,” said AWE’s principal investigator, Ludger Scherliess of Utah State University in Logan.
These events revealed variations in the types of atmospheric gravity waves created by different kinds of storms. For example, when AWE viewed atmospheric gravity waves generated by a thunderstorm in north Texas on May 26, 2024, it saw they were smaller and more irregular, with a notable asymmetry from north to south, compared to waves created by storms in the same part of the country earlier that month.
This image from AWE shows concentric atmospheric gravity waves caused by a severe weather event that included a tornado near the U.S.-Mexico border on May 3, 2024. Captured during orbit 2529 of AWE’s stay on the International Space Station, the image shows waves spreading across Texas and Mexico in near-perfect circles, a sight rarely observed with such clarity prior to the AWE mission.
NASA/Utah State University
It is important to understand variations in the density of plasma, which is electrically charged gas, in Earth’s upper atmosphere instigated by atmospheric gravity waves, because these variations can disrupt radio signals traveling between satellites and the ground, and from satellite to satellite, degrading the accuracy and reliability of systems used for navigation, timing, and communications.
In a recent study, AWE measurements also revealed the gravity waves with the greatest influence on the upper atmosphere have small horizontal wavelengths, ranging from 30 to 300 kilometers, which AWE was specifically designed to measure.
With its data-collection phase complete, the AWE instrument was turned off to make way for another science experiment that will take its place on the outside of the space station. Called CLARREO Pathfinder (Calibration Absolute Radiance and Refractivity Observatory Pathfinder), the new instrument will take measurements of sunlight reflected by Earth and the Moon that are five to 10 times more accurate than those from existing sensors. The exchange of instruments is a key part of the space station’s mission and versatility as an orbiting laboratory for various types of research.
As the International Space Station traveled over the southeastern United States on Sept. 26, 2024, AWE observed atmospheric gravity waves generated by Hurricane Helene as the storm slammed into the gulf coast of Florida. The curved bands extending to the northwest of Florida, artificially colored red, yellow, and blue, show changes in brightness (or radiance) in a wavelength of infrared light produced by airglow in Earth’s mesosphere. The small black circles on the continent mark the locations of cities.
Utah State University
In the coming days, a robotic arm on the space station, called Canadarm2, will remove the AWE instrument from its location. Soon afterward, the AWE instrument will be loaded into part of a SpaceX Dragon cargo spacecraft that will deorbit and burn up as it re-enters the atmosphere. However, all of AWE’s observations will ultimately become available to the public and the scientific community for ongoing research and discovery.
“Data from AWE will continue to be made public for both professional researchers and citizen scientists,” Scherliess said.
Some of this data already is available, including interactive, online visualizations on Utah State University’s website, where AWE’s observations are “painted” in swaths onto a globe or on a map as the space station orbits the planet. Users can rotate the visualizations to view atmospheric gravity waves from different angles.
A still image from an interactive visualization shows AWE data collected over the Western Hemisphere.
Utah State University
Launched on Nov. 9, 2023, AWE is managed by the Explorers Program Office at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. Utah State University’s Space Dynamics Laboratory built the AWE instrument and provided the mission operations center.
Hear more about AWE by listening to episode 334 of NASA’s Houston We Have a Podcast, recorded on Jan. 26, 2024.
By Vanessa Thomas NASA’s Goddard Space Flight Center, Greenbelt, Md.
