Popular Mechanics SA's video: 28 years ago today Space Shuttle Challenger exploded - 28 January 1986

On 28 January 1986, Space Shuttle Challenger exploded just 73 seconds after lift-off killing all seven astronauts on board. The cause of explosion was determined to be an o-ring failure in the right solid rocket booster. Cold weather was determined to be a contributing factor. For detailed information about the launch and the Challenger STS-51L accident, go to http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-51L.html To read the report from Joseph P Kerwin, biomedical specialist from the Johnson Space Centre in Houston, Texas, relating to the deaths of the astronauts in the Challenger accident, go to http://history.nasa.gov/kerwin.html Source: Nasa History http://www.history.nasa.gov/sts51l.html