Space Shuttle Challenger disaster anniversary

The nation is remembering the 29th anniversary of the Space Shuttle Challenger disaster.

The Challenger exploded 73 seconds into flight at about 11:40 a.m. on Jan. 28, 1986, killing all seven astronauts aboard.

On board was New Hampshire school teacher Christa McAuliffe. She would have been the first teacher in space.

The explosion was caused by a rocket booster failure, which ignited the fuel tank.

The disaster shut down NASA's shuttle program for over two years. Flights resumed on Sept. 29, 1986 with the Shuttle Discovery.

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