29th Anniversary of Space Shuttle Challenger Explosion — Where Were You? [VIDEO]

NASA centers across the country will pause today in remembrance of the Challenger explosion.

Hard to believe it was 29 years ago today -- January 28, 1986 -- when we all sat stunned as we watched the catastrophic events that took the lives of seven astronauts, including the first public school teacher in space, Christa McAuliffe.

Where were you when it happened?