NASA's space shuttle Challenger completed 10 missions before it broke apart during a launch in 1986, killing seven astronauts.

Steve Hawley, who flew five Space Shuttle missions, and Krista Schaffer, a first-grade teacher at Christa McAuliffe Elementary in Lenexa reflect on the 40th anniversary of the Challenger disaster.

Through the tragedy, the lives and legacy of the crew have endured, and 40 years later, Christa McAuliffe is still changing lives.

The three siblings of the late space shuttle Challenger pilot Capt. Michael J. Smith quietly joined Wednesday to lay flowers at a memorial in his honor on the

Forty years ago, Americans were shocked when the space shuttle Challenger exploded 73 seconds after it launched on a chilly day in Florida.