Thursday marks the 35th anniversary of the Challenger space shuttle explosion, a disaster that killed seven people 73 seconds after launch.

An O-ring failure blamed on cold weather doomed the shuttle before it even left the launch pad.

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Just a few seconds into the mission, a flame was seen breaking through the solid rocket booster that would ultimately lead to the catastrophic explosion that claimed the lives of astronauts Dick Scobee, Michael Smith, Ronald McNair, Ellison Onizuka, Gregory Jarvis, Judith Resnick and teacher Christa McAuliffe. Their names were added to the Space Memorial Mirror at the NASA Kennedy Space Center.

The incident resulted in a 32-month suspension of NASA's shuttle program and the creation of the Rogers Commission, a group created by Ronald Reagan to examine what went wrong.

Here's a look at what you need to know about the 1986 space shuttle Challenger disaster

Facts

Seven crew members died in the explosion, including Christa McAuliffe, who would have been the first teacher in space.

The explosion was a result of a rocket booster failure which ignited the fuel tank.

Some of the objectives of Mission STS-51L included the "Comet Halley Active Monitoring Program" (CHAMP), a fluid dynamics experiment, and lesson plans and telecasts by Christa McAuliffe.

Timeline

April 4, 1983 - The Challenger's maiden voyage, STS-6. The Challenger completed nine successful missions between 1983 and 1986.

July 19, 1985 - New Hampshire teacher Christa McAuliffe is chosen to be the first teacher in space.

Jan. 28, 1986 - The Space Shuttle Challenger explodes 73 seconds into flight at approximately 11:40 a.m. EST. Read more at KMBC