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)