NASA personnel and members of the public watch as a wreath is laid at Tomb of the Unknowns during NASA's Day of Remembrance, Thursday, Jan. 25, 2018, at Arlington National Cemetery in Arlington, Virginia. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA astronauts Mark Vande Hei and Joe Acaba attend the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, tour the museum at the Tomb of the Unknowns, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, meet with the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Joe Acaba, left, and Mark Vande Hei, right, meet with the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA leadership and guests watch the changing of the guard at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Jim Bridenstine, left, lays a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, February 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, lays a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, February 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Charles Bolden and his wife Alexis lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Friday, Jan. 31, 2014, at Arlington National Cemetery. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA leadership and guests watch the changing of the guard at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Charles Bolden and his wife Alexis lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Friday, Jan. 31, 2014, at Arlington National Cemetery. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson lays a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

A wreath is laid at the Tomb of the Unknowns by acting NASA Administrator Steve Jurczyk as part of NASA's Day of Remembrance, Thursday, Jan. 28, 2021, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson lays a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA personnel watch as a wreath is laid at the Tomb of the Unknowns by NASA Administrator Charles Bolden as part of NASA's Day of Remembrance, Wednesday, Jan. 28, 2015, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

Taps is played by a member of The Old Guard after NASA Administrator Jim Bridenstine laid a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Feb. 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson is seen leaving the Tomb of the Unknowns with Executive Director of the Office of Army Cemeteries, Karen Durham-Aguilera, after a wreath laying ceremony as part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Members of The Old Guard, 3rd U.S. Infantry Regiment, bring a wreath that will be laid at the Tomb of the Unknowns by NASA acting Administrator Janet Petro and NASA Astronaut Kayla Barron as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

Taps is played by the Honor Guard after NASA Administrator Charles Bolden and his wife Alexis laid a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Friday, Jan. 31, 2014, at Arlington National Cemetery. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA personnel watch as a wreath is laid at the Tomb of the Unknowns by NASA acting Administrator Janet Petro, left, and NASA Astronaut Kayla Barron, as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson is provided a historical tour at the Tomb of the Unknowns, before a wreath laying ceremony as part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA personnel watch as NASA Administrator Jim Bridenstine prepares to lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Feb. 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Taps is played by a member of The Old Guard after NASA Deputy Administrator Jim Morhard laid a wreath at the Tomb of the Unknowns as part of NASA’s Day of Remembrance, Thursday, Jan. 30, 2020, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

NASA personnel watch as a wreath is laid at the Tomb of the Unknowns by NASA acting Administrator Janet Petro, left, and NASA Astronaut Kayla Barron, as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

A member of The Old Guard, 3rd U.S. Infantry Regiment, are seen during a changing of the guard at the Tomb of the Unknowns ahead of a wreath laying ceremony during NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

Members of The Old Guard bring in a wreath to be laid the Tomb of the Unknowns by acting NASA Administrator Steve Jurczyk as part of NASA's Day of Remembrance, Thursday, Jan. 28, 2021, at Arlington National Cemetery in Arlington, Va. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA astronaut Mark Vande Hei, center, his wife Julie, left, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Mark Vande Hei, third from left, and Joe Acaba, third from right, meet with the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Mark Vande Hei, center, his wife Julie, right, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, listen as Sergeant Craig Hudson explains the tradition of the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Mark Vande Hei, center, his wife Julie, left, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA personnel watch as a wreath is laid at the Tomb of the Unknowns by NASA Administrator Charles Bolden as part of NASA's Day of Remembrance, Friday, Jan. 31, 2014, at Arlington National Cemetery. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, listen as Sergeant Craig Hudson explains the tradition of the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, listen as Sergeant Craig Hudson explains the tradition of the Honor Guard at the Tomb of the Unknowns, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Mark Vande Hei, center, his wife Julie, left, and NASA astronaut Joe Acaba witness the changing of the guards at the Tomb of the Unknown soldier, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA acting Administrator Janet Petro, left in red, and NASA Astronaut Kayla Barron, prepare to lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

Amy Resnik, sister-in-law, left, and Chuck Resnik, brother of the late space shuttle Challenger astronaut Judy Resnik, along with acting NASA Administrator Robert Lightfoot, third from left, lay a wreath at the Tomb of the Unknowns during NASA's Day of Remembrance, Thursday, Jan. 25, 2018, Arlington National Cemetery in Arlington, Virginia. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson prepares to be escorted to the Tomb of the Unknowns for a wreath laying ceremony, as part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Astronaut Kayla Barron, left in blue, and NASA acting Administrator Janet Petro, in red, watch the changing of the guard at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA personnel watch as a wreath is laid at the Tomb of the Unknowns by NASA acting Administrator Janet Petro, left, and NASA Astronaut Kayla Barron, as part of NASA's Day of Remembrance, Thursday, Jan. 23, 2025, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA personnel watch as "Taps" is played by The Old Guard after a wreath was laid at the Tomb of the Unknowns by NASA Administrator Jim Bridenstine as part of NASA's Day of Remembrance, Thursday, Feb. 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Bill Nelson prepares to leave after laying a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

NASA personnel watch the Changing of the Guard ritual before a wreath is laid at the Tomb of the Unknowns by NASA Administrator Jim Bridenstine as part of NASA's Day of Remembrance, Thursday, Feb. 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Taps is played by a member of The Old Guard after NASA Administrator Jim Bridenstine laid a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Feb. 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Amy Resnik, sister-in-law, left, and Chuck Resnik, brother of the late space shuttle Challenger astronaut Judy Resnik, along with acting NASA Administrator Robert Lightfoot, third from left, lay a wreath at the Tomb of the Unknowns during NASA's Day of Remembrance, Thursday, Jan. 25, 2018, at Arlington National Cemetery in Arlington, Virginia. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson is escorted to the Tomb of the Unknowns for a wreath laying ceremony by Executive Director of the Office of Army Cemeteries, Karen Durham-Aguilera, as part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Amy Resnik, sister-in-law, left, and Chuck Resnik, brother of the late space shuttle Challenger astronaut Judy Resnik, along with acting NASA Administrator Robert Lightfoot, third from left, lay a wreath at the Tomb of the Unknowns during NASA's Day of Remembrance, Thursday, Jan. 25, 2018, at Arlington National Cemetery in Arlington, Virginia. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

Taps is played by a member of The Old Guard after a wreath was laid at the Tomb of the Unknowns by acting NASA Administrator Steve Jurczyk as part of NASA's Day of Remembrance, Thursday, Jan. 28, 2021, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

A member of The Old Guard, 3rd U.S. Infantry Regiment, is seen at the Tomb of the Unknowns ahead of a wreath laying ceremony during NASA's Day of Remembrance, Thursday, Jan. 27, 2022, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

Members of The Old Guard, 3rd U.S. Infantry Regiment, are seen during a changing of the guard at the Tomb of the Unknowns ahead of a wreath laying ceremony during NASA's Day of Remembrance, Thursday, Jan. 27, 2022, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

Taps is played by the Honor Guard after NASA Administrator Charles Bolden, left, and his wife Alexis laid a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Friday, Jan. 31, 2014, at Arlington National Cemetery. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA personnel watch the guard-change ceremony at the Tomb of the Unknowns by as part of NASA's Day of Remembrance, Thursday, Jan. 28, 2021, at Arlington National Cemetery in Arlington, Va. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Associate Administrator Bob Cabana watches as a wreath is laid at the Tomb of the Unknowns by NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy as part of NASA's Day of Remembrance, Thursday, Jan. 27, 2022, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Bill Nelson, NASA Deputy Administrator Pam Melroy, and NASA Associate Administrator Bob Cabana are seen after a wreath is laid at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 27, 2022, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Associate Administrator Bob Cabana, left, NASA Deputy Administrator Pam Melroy, and NASA Administrator Bill Nelson, prepare to be escorted to the Tomb of the Unknowns for a wreath laying as part of NASA's Day of Remembrance, Thursday, Jan. 27, 2022, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Charles Bolden and his wife Alexis lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Wednesday, Jan. 28, 2015, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

NASA personnel watch as a wreath is laid at the Tomb of the Unknowns by NASA Administrator Charles Bolden and his wife Alexis as part of NASA's Day of Remembrance, Wednesday, Jan. 28, 2015, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

NASA personnel, family members of those lost in Challenger, Columbia, Apollo 1 and members of the public watch as a wreath is laid at the Tomb of the Unknowns by NASA Administrator Charles Bolden as part of NASA's Day of Remembrance, Friday, Jan. 31, 2014, at Arlington National Cemetery. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Charles Bolden and his wife Alexis lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Wednesday, Jan. 28, 2015, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

NASA personnel watch as a wreath is laid at the Tomb of the Unknowns by acting NASA Administrator Steve Jurczyk as part of NASA's Day of Remembrance, Thursday, Jan. 28, 2021, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA personnel and members of the public watch as a wreath is laid at the Tomb of the Unknowns by NASA Administrator Charles Bolden as part of NASA's Day of Remembrance, Friday, Jan. 31, 2014, at Arlington National Cemetery. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

NASA Leadership and staff participate in a wreath laying ceremony at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

Members of The Old Guard prepare for a wreath laying ceremony at the Tomb of the Unknowns as part of NASA’s Day of Remembrance, Thursday, Jan. 30, 2020, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

NASA Deputy Administrator Jim Morhard lays a wreath at the Tomb of the Unknowns as part of NASA’s Day of Remembrance, Thursday, Jan. 30, 2020, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

The Changing of the Guard at the Tomb of the Unknowns is seen prior to the laying of a wreath as part of NASA’s Day of Remembrance, Thursday, Jan. 30, 2020, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, and NASA Deputy Administrator Pam Melroy, right, lay a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

Taps is played by a member of The Old Guard after acting NASA Administrator Robert Lightfoot, Amy Resnik, sister-in-law, and Chuck Resnik, brother of the late space shuttle Challenger astronaut Judy Resnik laid a wreath at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2018, at Arlington National Cemetery in Arlington, Virginia. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Bill Ingalls)

Taps is played by a member of The Old Guard after NASA Deputy Administrator Jim Morhard laid a wreath at the Tomb of the Unknowns as part of NASA’s Day of Remembrance, Thursday, Jan. 30, 2020, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

A wreath placed by NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy is seen at the Tomb of the Unknowns as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

NASA Administrator Bill Nelson is escorted to the Tomb of the Unknowns for a wreath laying ceremony by Executive Director of the Office of Army Cemeteries, Karen Durham-Aguilera, as part of NASA's Day of Remembrance, Thursday, Jan. 25, 2024, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Keegan Barber)

Members of The Old Guard, 3rd U.S. Infantry Regiment, are seen carrying in a wreath that will be placed at the Tomb of the Unknowns by NASA Administrator Bill Nelson during NASA's Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Taps is played by a member of The Old Guard after NASA Deputy Administrator Jim Morhard laid a wreath at the Tomb of the Unknowns as part of NASA’s Day of Remembrance, Thursday, Jan. 30, 2020, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

Expedition 36/37 prime and backup crewmembers pay homage at the Tomb of the Unknown Soldier at Red Square in Moscow May 8 in honor of Russian Victory Day May 9. From left to right are backup crewmember Koichi Wakata of the Japan Aerospace Exploration Agency, prime Flight Engineer Karen Nyberg of NASA, prime Soyuz Commander Fyodor Yurchikhin, prime Flight Engineer Luca Parmitano of the European Space Agency and backup crewmember Rick Mastracchio of NASA. Nyberg, Yurchikhin and Parmitano are preparing for their launch May 29, Kazakh time, in their Soyuz TMA-09M spacecraft from the Baikonur Cosmodrome in Kazakhstan for a six-month mission on the International Space Station. NASA/Stephanie Stoll

Expedition 36/37 Flight Engineer Karen Nyberg of NASA lays a flower at the Tomb of the Unknown Soldier at Red Square in Moscow May 8 in honor of Russian Victory Day May 9. Behind Nyberg from left to right are backup crewmember Koichi Wakata of the Japan Aerospace Exploration Agency, prime Soyuz Commander Fyodor Yurchikhin, prime Flight Engineer Luca Parmitano of the European Space Agency and backup crewmember Rick Mastracchio of NASA. Nyberg, Yurchikhin and Parmitano are preparing for their launch May 29, Kazakh time, in their Soyuz TMA-09M spacecraft from the Baikonur Cosmodrome in Kazakhstan for a six-month mission on the International Space Station. NASA/Stephanie Stoll

Expedition 36/37 prime and backup crewmembers approach the Tomb of the Unknown Soldier at Red Square in Moscow May 8 to lay flowers in honor of Russian Victory Day May 9. From left to right are prime Flight Engineer Karen Nyberg of NASA, prime Soyuz Commander Fyodor Yurchikhin, prime Flight Engineer Luca Parmitano of the European Space Agency and backup Flight Engineer Rick Mastracchio of NASA. Nyberg, Yurchikhin and Parmitano are preparing for their launch May 29, Kazakh time, in their Soyuz TMA-09M spacecraft from the Baikonur Cosmodrome in Kazakhstan for a six-month mission on the International Space Station. NASA/Stephanie Stoll

NASA Administrator Jim Bridenstine, NASA employees, and members of the public bow their heads at the Space Shuttle Challenger and Columbia memorials during a wreath laying ceremony as part of NASA's Day of Remembrance, Thursday, February 7, 2019, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Aubrey Gemignani)

Tim Frank describes the history of the Tomb Guard to NASA astronauts Mark Vande Hei, left, and Joe Acaba, center, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Joe Acaba, right, shakes hands with Lieutenant Colonel Jeffery Todd Burroughs, battalion commander, Old Guard, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Charles Bolden and his wife Alexis watch as Tomb guards with The Old Guard, the 3rd U.S. Infantry Regiment, perform a changing of the guard prior to a wreath-laying ceremony as part of NASA's Day of Remembrance, Wednesday, Jan. 28, 2015, at Arlington National Cemetery in Arlington, Va. The wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Photo Credit: (NASA/Joel Kowsky)

NASA astronauts Mark Vande Hei, center, and Joe Acaba, right, present Lieutenant Colonel Jeffery Todd Burroughs, battalion commander, Old Guard, and others from the Honor Guard with their patch that was flown onboard the International Space Station during Expedition 54, Friday, June 15, 2018 at the Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Mark Vande Hei, left, and Joe Acaba, right, present Jerry Farnsworth, chief of staff at Arlington National Cemetery with a montage from Expedition 54, Friday, June 15, 2018 in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronauts Mark Vande Hei, left, and Joe Acaba, right, present Jerry Farnsworth, chief of staff at Arlington National Cemetery with a patch flown onboard the International Space Station during Expedition 54, Friday, June 15, 2018 in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)