NASA Administrator Bill Nelson lays flowers at the grave markers of Virgil "Gus" Grissom and Roger Chaffee from Apollo 1, during a ceremony that was part of NASA's Day of Remembrance, Thursday, Jan. 26, 2023, 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/Aubrey Gemignani)