Following rollout of space shuttle Endeavour from the Vehicle Assembly Building to Launch Pad 39B on April 17, two shuttles were on the launch pads at the same time at NASA's Kennedy Space Center, Fla. Shuttle Atlantis already had been moved to Launch Pad 39A.
Endeavour will stand by at pad B in the unlikely event that a rescue mission is necessary during Atlantis' upcoming mission to upgrade NASA's Hubble Space Telescope. With the space shuttle fleet set for retirement in 2010, this is expected to be the final time two shuttles will be on launch pads at the same time.
Video includes aerials of the shuttles on April 17, and sunrise shots and additional aerials on April 18.