Former NASA astronaut Kay Hire, left, speaks with film producer, co-writer, and director James Gray at a screening of "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. It stars Tommy Lee Jones, Brad Pitt, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Producer, co-writer, and director James Gray is interviewed by NASA television on the red carpet during a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film stars Tommy Lee Jones, Brad Pitt, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Producer, co-writer, and director James Gray speaks before a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film stars Tommy Lee Jones, Brad Pitt, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, actor Brad Pitt, producer, co-writer, and director James Gray, and actor Tommy Lee Jones are seen on stage before a screening of their film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film stars Pitt, Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, actor Tommy Lee Jones, film producer, co-writer, and director James Gray, and actor Brad Pitt arrive on the red carpet for a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film stars Pitt, Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, NASA staff, Cindy Steele, Bert Ulrich, and Cheryl Warner, "Ad Astra" producer, co-writer, and director James Gray, former NASA astronaut Kay Hire, and NASA Associate Administrator for the Office of Communications, Bettina Inclán, pose for a photo on the red carpet during a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Pitt, Tommy Lee Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, actor Brad Pitt, NASA Administrator Jim Bridenstine, film producer, co-writer, and director James Gray, and actor Tommy Lee Jones are seen in the green room before a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film stars Pitt, Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, actor Brad Pitt, NASA Administrator Jim Bridenstine, film producer, co-writer, and director James Gray, and actor Tommy Lee Jones pose for a photo in the green room before a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film stars Pitt, Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Former NASA astronaut Kay Hire and NASA Administrator Jim Bridenstine pose for a photo on the red carpet during a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Jones, Brad Pitt, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Actor Brad Pitt speaks before a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Pitt, Tommy Lee Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Actor Tommy Lee Jones arrives on the red carpet for a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Jones, Brad Pitt, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Actor Tommy Lee Jones speaks before a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Jones, Brad Pitt, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Actor Brad Pitt arrives on the red carpet for a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Pitt, Tommy Lee Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Actor Brad Pitt is interviewed by NASA television on the red carpet during a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Pitt, Tommy Lee Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Actor Brad Pitt arrives on the red carpet for a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Pitt, Tommy Lee Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

Former NASA astronaut Kay Hire is interviewed on the red carpet during a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Brad Pitt, Tommy Lee Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

NASA staff, from left to right, Cindy Steele, Bert Ulrich, Bettina Inclán, and Cheryl Warner pose for a photo on the red carpet during a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Pitt, Tommy Lee Jones, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, former NASA astronaut Kay Hire, NASA Administrator Jim Bridenstine, and actor Tommy Lee Jones arrive on the red carpet for a screening of the film "Ad Astra" at National Geographic Society, Monday, September 16, 2019 in Washington. The film was produced, co-written, and directed by James Gray and stars Jones, Brad Pitt, Ruth Negga, Liv Tyler, and Donald Sutherland. Pitt stars as astronaut Roy McBride who travels deep into the solar system in hopes of solving a mystery that threatens life on Earth. Photo Credit: (NASA/Aubrey Gemignani)

jsc2022e042479 (2/3/2022) --- This image shows three modules of flight hardware for the Biopolymer Research for In-Situ Capabilities investigation, launching aboard SpaceX’s 25th commercial resupply services mission to the International Space Station. The hardware is 3D printed in gray PLA, a desiccant packet is epoxied in the center of the module, and a pressure and humidity sensor is fastened to the left. Each module makes two bricks, for a total of six bricks that will be made in space. This investigation studies how microgravity affects the process of creating biopolymer soil composite (BSC), a concrete alternative that could be made with on-site material such as lunar or Martian dust. Image curtsey of James Wall.

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to hover above the ground as it nears touchdown on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar

CAPE CANAVERAL, Fla. - With drag chute unfurled, space shuttle Discovery rolls past a fire rescue vehicle on Runway 33 as it lands at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 15 days in space, completing the more than 6.2-million-mile STS-131 mission on orbit 238. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar

CAPE CANAVERAL, Fla. - With drag chute unfurled, space shuttle Discovery lands on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 15 days in space, completing the more than 6.2-million-mile STS-131 mission on orbit 238. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo Credit: NASA_Tony Gray

CAPE CANAVERAL, Fla. - Space shuttle Discovery touches down on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar

CAPE CANAVERAL, Fla. - Space shuttle Discovery lands on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo Credit: NASA_Tony Gray

CAPE CANAVERAL, Fla. - Space shuttle Discovery is moments away from touchdown on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar

CAPE CANAVERAL, Fla. - Space shuttle Discovery appears to hover above the ground as it nears touchdown on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar

KENNEDY SPACE CENTER, FLA. -- In the White Room on Launch Pad 39A, members of the closeout crew help STS-117 Mission Specialist James Reilly secure his launch suit before climbing into Space Shuttle Atlantis. The mission to the International Space Station is scheduled to launch at 7:38 p.m. EDT. Members of the closeout crew help the astronauts don a parachute pack, strap them into the space shuttle's crew module and take care of any other last-minute needs that arise. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The shuttle is delivering a new segment to the starboard side of the space station's backbone, known as the truss. Three spacewalks are planned to install the S3/S4 truss segment, deploy a set of solar arrays and prepare them for operation. STS-117 is the 118th space shuttle flight, the 21st flight to the station, the 28th flight for Atlantis and the first of four flights planned for 2007. Photo credit: NASA/Tony Gray & Don Kight

CAPE CANAVERAL, Fla. - With drag chute unfurled, space shuttle Discovery lands on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida after 15 days in space, completing the more than 6.2-million-mile STS-131 mission on orbit 238. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo Credit: NASA_Tony Gray

CAPE CANAVERAL, Fla. - Space shuttle Discovery is moments away from touchdown on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar

CAPE CANAVERAL, Fla. - Space shuttle Discovery nears touchdown on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar

S71-30463 (May 1971) --- This is the insignia designed for the Apollo 15 lunar landing mission. The circular design features the colors red, white and blue. On the outer portion of the patch a narrow band of blue and a narrow band of red encircle a wider band of white. The large disc in the center of the emblem has red, white and blue symbols of flight, superimposed over an artist's concept of the Apollo 15 Hadley-Apennine landing site of gray tone. The surnames of the three names are centered in the white band at the bottom of the insignia. The Apollo 15 prime crew men are David R. Scott, commander; Alfred M. Worden, command module pilot; and James B. Irwin, lunar module pilot. This is the official Apollo 15 emblem, property of the government of the United States. It has been authorized only for use by the astronauts. Its production in any form other than in news, information and education media is not authorized without approval. Unauthorized use of the photograph is subject to the provisions of Title 18, U.S. Code, Section 701.

CAPE CANAVERAL, Fla. - Space shuttle Discovery lands on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo Credit: NASA_Tony Gray

CAPE CANAVERAL, Fla. - Space shuttle Discovery nears touchdown on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. Landing was at 9:08 a.m. EDT, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. EDT followed by nose gear touchdown at 9:08:47 a.m. and wheelstop at 9:09:33 a.m. Aboard are Commander Alan Poindexter; Pilot James P. Dutton Jr.; and Mission Specialists Rick Mastracchio, Clayton Anderson, Dorothy Metcalf-Lindenburger, Stephanie Wilson and Naoko Yamazaki of the Japan Aerospace Exploration Agency. The seven-member STS-131 crew carried the multi-purpose logistics module Leonardo, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the International Space Station's laboratories. The crew also switched out a gyroscope on the station’s truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station’s exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall. For information on the STS-131 mission and crew, visit http:__www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts131_index.html. Photo credit: NASA_Tony Gray and Tom Farrar