Forty years ago, the Challenger space shuttle disintegrated just after lift-off. A small team of engineers tried to prevent the tragedy.

The space shuttle Challenger explosion was a defining moment of the 1980s. Whether you were watching on TV or in person, chances are, you remember exactly where you were and how you felt.

(CNN) - Wednesday marks the 40th anniversary of the Challenger space shuttle explosion. It was a moment of collective grief on Jan. 28, 1986, when the space shuttle exploded during a live broadcast.

The space shuttle's seven crew members died, including one civilian teacher. The tragedy changed the course of NASA's future. On the morning of January 28, 1986, seven crew members were killed when ...

TODAY marks four decades since the Challenger space shuttle exploded just 73 seconds into its flight. Millions watched the disaster unfold live, as the tragedy was broadcast in schools and on TV ...

On Jan. 28, 1986, NASA’s 25th space shuttle mission, Challenger, left the launchpad in Cape Canaveral, Florida. Seventy-three seconds into flight, Challenger exploded over the Atlantic Ocean as ...

The tug-of-war over space shuttle Discovery is becoming more volatile. Discovery — the crown jewel of the Smithsonian Institution's Udvar-Hazy Center in Chantilly, Virginia — is the subject of a ...

When Space Shuttle Discovery touched down for the last time at Kennedy Space Center Runway 15 on March 9, 2011, it brought to an end a 27-year career of spaceflight. Discovery flew to space 39 times, ...