#Repost @nasa with @repostapp ・・・ Today, we observe our annual Day of Remembrance to commemorate the crews of Apollo 1, and space shuttles Challenger and Columbia, as well as other members of the NASA family who lost their lives furthering the cause of exploration. This year also marks the 50th anniversary of the accidental fire, that occurred inside an Apollo spacecraft on the launch pad at Cape Kennedy, that tragically claimed the lives of Apollo 1 astronauts, Virgil Grissom, Edward White and Roger Chaffee. #nasa #apollo1 #challenger #columbia #nasaremembers