"It is the worst disaster in the history of the American space program." Forty years ago on January 28, 1986, the space shuttle Challenger exploded 73 seconds after liftoff from Cape Canaveral, killing all seven crew members, including school teacher Christa McAuliffe from New Hampshire, who had won a national competition to become the first teacher in space. Peter Jennings anchored ABC's World News Tonight from Washington, with John Quiñones leading off the broadcast's coverage. | ABC World New

Space Shuttle Challenger broke apart 73 seconds after launch. Today we remember seven crew members whose lives were taken during the disaster. | WESH 2 News

Meet the Challenger 2 main battle tank crew of four Army Reserves from The Royal Wessex Yeomanry while serving out in Estonia as part of NATO’s enhanced Forward Presence. Learn more about the crew who made regimental history out in Estonia, as they talk about their role and experience within the Army Reserves. Find out more about the Challenger 2: https://www.army.mod.uk/equipment/combat-vehicles/ | British Army