“NASA is an agency built on the legacy of brave explorers. Sixteen years ago today we lost the crew of the Space Shuttle Columbia. Their bravery and service to humankind will forever inspire new generations of explorers.” —NASA Administrator, Jim Bridenstine (jimbridenstine) ✨ #adastra #astronauts #nasahistory #spaceshuttle #columbia #onthisday #odt #inremembrance #space #explorers