Space Shuttle Discovery launches for mission STS-120
Tuesday, October 23, 2007
About two hours before the scheduled launch, NASA discovered and assessed the threat posed by a 4 by 1.5-inch (10.16 by 3.81-cm) chunk of ice that had formed on a pipe that connects the external tank and the space shuttle main engines. A strike from debris at launch was responsible for the loss of the Space Shuttle Columbia in February 2003.
- "Shuttle heads for space station" — , October 23, 2007
- Associated Press. "Space Shuttle Lifts Off on Schedule After NASA Finds Ice on Discovery" — , October 22, 2007
- "STS-120" — , October 23, 2007