The crew of Space Shuttle Atlantis departs for the launch pad at Kennedy Space Center in Florida

From right to left, NASA STS-125 mission commander Scott D. Altman, pilot Gregory C. Johnson, mission specialist K. Megan McArthur, mission specialist Andrew J. Feustel, mission specialist John M. Grunsfeld, astronaut Michael T. Good and astronaut Michael J. Massimino pose for a photo before boarding a van to take them to Space Shuttle Atlantis at Kennedy Space Center, Florida on May 11, 2009. Space Shuttle Atlantis is scheduled to take off today at 2:01 pm for an 11-day service mission to the Hubble Space Telescope. (UPI Photo/Kevin Dietsch)