The external fuel tank arrives at Port Canaveral towed on the Pegasus barge by a rocket booster retrieval ship.

The external fuel tank for space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope arrives at Port Canaveral, Fla., towed on the Pegasus barge by a solid rocket booster retrieval ship. The tank will be towed to the turn basin in the Launch Complex 39 Area at NASA's Kennedy Space Center, offloaded and moved to the Vehicle Assembly Building. Once inside the building, the tank will be raised to vertical, lifted and moved into a checkout cell. Stacking of the tank and solid rocket boosters is planned to start Aug. 7. Atlantis is targeted to launch Oct. 8. Photo credit: NASA/Jack Pfaller