From left to right, NASA Associate Administrator Jim Free, NASA Administrator Bill Nelson and NASA Deputy Administrator Pam Melroy are seen during a wreath laying ceremony, as a 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 Deputy Administrator Pam Melroy, center, is seen with Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, NASA Administrator Bill Nelson, Todd Citron, chief technology officer, The Boeing Company, and Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, following a news conference on NASA’s Sustainable Flight Demonstrator project, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC. Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)

Todd Citron, chief technology officer, The Boeing Company, left, delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project as NASA Administrator Bill Nelson, second from left, Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, NASA Deputy Administrator Pam Melroy, and Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, look on, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC. Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)

Todd Citron, chief technology officer, The Boeing Company, left, delivers remarks during a news conference on NASA’s Sustainable Flight Demonstrator project as NASA Administrator Bill Nelson, second from left, Bob Pearce, associate administrator for NASA's Aeronautics Research Mission Directorate, NASA Deputy Administrator Pam Melroy, and Brent Cobleigh, program manager for the Sustainable Flight Demonstrator at NASA's Armstrong Flight Research Center, look on, Wednesday, Jan. 18, 2023, at the Mary W. Jackson NASA Headquarters building in Washington, DC. Through a Funded Space Act Agreement, The Boeing company and its industry team will collaborate with NASA to develop and flight-test a full-scale Transonic Truss-Braced Wing demonstrator aircraft. Photo Credit: (NASA/Joel Kowsky)

Harm van de Wetering, director of the Netherlands Space Office, left, NASA Administrator Bill Nelson, second from right, Chiragh Parikh, executive secretary of the National Space Council, not visible, NASA Deputy Administrator Pam Melroy, second from right, and Ambassador of the Kingdom of the Netherlands to the United States Birgitta Tazelaar, right, are seen as they speak following the signing of the Artemis Accords, Wednesday, Nov. 1, 2023, at the Dutch Ambassador’s Residence in Washington. Netherlands is the 31st country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Bill Nelson, left, NASA Deputy Administrator Pam Melroy, Harm van de Wetering, director of the Netherlands Space Office, Ambassador of the Kingdom of the Netherlands to the United States Birgitta Tazelaar, and Chiragh Parikh, executive secretary of the National Space Council, pose for a picture after the signing of the Artemis Accords, Wednesday, Nov. 1, 2023, at the Dutch Ambassador’s Residence in Washington. Netherlands is the 31st country to sign the Artemis Accords, which establish a practical set of principles to guide space exploration cooperation among nations participating in NASA’s Artemis program. Photo Credit: (NASA/Joel Kowsky)

Vice President Kamala Harris, right, speaks with NASA Deputy Administrator Pam Melroy, left, MSIT Minister Jong-Ho Lee, Dr. Makenzie Lystrup, Director of NASA’s Goddard Space Flight Center, and NASA Astronaut Jonny Kim prior to the arrival of President Yoon Suk Yeol of the Republic of Korea, Tuesday, April 25, 2023, during a tour of NASA’s Goddard Space Flight Center in Greenbelt, Md. Photo Credit: (NASA/Joel Kowsky)