The U.S. National Aeronautics and Space Administration, has marked the 25th anniversary of the shuttle Challenger disaster, which killed all seven crew members and triggered questions about the safety of shuttle flights. The crew was honored Friday in a ceremony at Kennedy Space Center in Florida.
Jan. 28, 1986, the Challenger exploded 73 seconds after blasting off from the Kennedy Space Center. The explosion was found to be linked to faulty seals on the launch vehicle.
One crew member was school teacher Christa McAuliffe. She was to be the first teacher being sent into space.