Look Back: Space shuttle Challenger explodes Jan. 28, 1986

Sequential photos taken by NASA during the catastrophic flight of the Space shuttle Challenger. The image shows a firey plume excaping from the right solid rocket booster and growing toward an explosion. 75 seconds after its launch, the Challenger blew up, killing all seven crew.

The solid fuel rocket booster of the space shuttle Challenger starting to explode over Kennedy Space Center.

The crew for the Challenger flight leaves their quarters for the launch pad. Front to back are Commander Francis Scobee, Mission Spc. Judith Resnik, Mission Spc. Ronald McNair, Payload Spc. Gregory Jarvis, Mission Spc. Ellison Onizuka, Payload Spc. Christa McAuliffe, and pilot Michael Smith.