Families of the astronauts lost in the space shuttle Challenger accident gathered back at the launch site Thursday to mark ...

NASA observed its annual Day of Remembrance Thursday to commemorate the astronauts killed in the Apollo 1 and space shuttle ...

NASA's space shuttle Challenger exploded and broke apart Jan. 28, 1986, in the sky over East-Central Florida, killing the ...

The 40th anniversary of the Challenger disaster cast a shadow over NASA's annual Day of Remembrance event inside the Space ...

NASA's tributes to fallen astronauts serve as reminders of the importance of safety in space exploration, as do tributes to these crews.

A candle lighting and wreath placement at Marshall Space Flight Center is among the events set for Thursday.

Families of the astronauts lost in the space shuttle Challenger accident are marking that tragic day 40 years ago ...

NASA remembrance day commemorates the astronauts who died in the Challenger, Columbia and Apollo One tragedies ...