The Space Shuttle Challenger Memorial is seen just after NASA astronaut Joe Acaba placed a flower there, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
The Space Shuttle Challenger Memorial is seen just after NASA astronaut Joe Acaba placed a flower there, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)