Wednesday marks 40 years since the Space Shuttle Challenger disaster. On Jan. 28, 1986, the Challenger took off from the Kennedy Space Center in Florida. But just 73 seconds after lift-off, it exploded. All seven crew members, including high school teacher Christa McAuliffe, lost their lives. CBS News space consultant Bill Harwood covered the launch when it happened and joins "The Daily Report" to discuss.
