36 years since the Challenger explosion

On Jan. 27 every year, the entire agency commemorates space missions that ended in tragedy.

NASA's space shuttle Challenger launched from the Kennedy Space Center at Cape Canaveral, Florida on its 10th mission on Jan. 28, 1986.

It exploded 73 seconds after liftoff, claiming the lives of all seven people onboard: Gregory Jarvis, Judith Resnik, Dick Scobee, Ronald McNair, Mike Smith, Ellison Onizuka and Christa McAuliffe.