NASA Administrator Bill Nelson, right, along with family and friends of Challenger and Columbia astronauts, from left to right, Dan Tani, Jane Tani, Amy Resnik, Chuck Resnik, and Kristy Carroll, stop at the gravesite of former astronaut and U.S. Senator John Glenn to pay their respects, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. Nelson, along with family and friends of Challenger and Columbia astronauts, had earlier laid wreaths in memory of those men and women who lost their lives in the quest for space exploration as part of NASA's Day of Remembrance. Photo Credit: (NASA/Aubrey Gemignani)