On the 33rd anniversary of the Space Shuttle Challenger disaster, we remember the 7 crew members killed. We take a look back at Peter Jennings' reporting on the explosion on January 28, 1986. | Good Morning America

The NASA space shuttle Challenger exploded 40 years ago, on January 28, 1986, just 73 seconds after liftoff. The disaster claimed the lives of all seven astronauts aboard, including Christa McAuliffe, a teacher from New Hampshire who would have been the first civilian in space. “The crew of the space shuttle Challenger honored us by the manner in which they lived their lives,” President Regan said in an address to the nation that night. “We will never forget them, nor the last time we saw them,

On January 28, 1986, the NASA space shuttle Challenger exploded 73 seconds after lift-off from Cape Canaveral, killing all seven crew members. It has been called the worst moment in the history of the American space program. #9News | 9 News

On Jan. 28, 1986, the space shuttle Challenger exploded 73 seconds after liftoff from Cape Canaveral, killing all seven crew members, including schoolteacher Christa McAuliffe. This is original Eyewitness News coverage from that day. What are your memories of that sad day in American history? | ABC7NY

40 years ago this morning, the unthinkable happened: the Space Shuttle Challenger exploded 73 seconds after liftoff, killing all 7 astronauts on board, including Christa McAuliffe, who was supposed to be the first teacher in space. School children watched in horror as the tragedy happened. This is original coverage from the Eyewitness News vault. | ABC7NY