NASA’s Day of Remembrance
The graves of Apollo 1 crew members, Virgil Grissom, left, and Roger Chaffee are seen during a wreath laying ceremony 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.
Media Credit: Bill Ingalls/NASA
Each year, NASANational Aeronautics and Space Administration remembers and pays tribute to the crews of Apollo 1 and space shuttles Challenger and Columbia, as well as other colleagues who gave their lives while furthering the cause of exploration and discovery.