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Stephen Feldman, at podium, president and CEO of the Astronauts Memorial Foundation speaks in front of the memorial during a rememberance ceremony to mark the 25th Anniversary of space shuttle Challenger explosion at the Kennedy Space Center visitor complex in Cape Canaveral, Fla., Friday, Jan. 28, 2011. (AP Photo/John Raoux)

Remembering the Challenger

The NASA lost seven of its own on the morning of

Jan. 28, 1986, when a booster engine failed, causing the Shuttle

Challenger to break apart just 73 seconds after launch. (Reuters)