Orleans, Louisiana, on February 24, 2010. ET-136 measured long and in diameter. The solid rocket booster retrieval ship Liberty Star towed the ET in the enclosed barge Pegasus. After docking in the turn basin at the Kennedy Space Center, the tank was offloaded and driven to the Vehicle Assembly Building (VAB) on March 1, 2010. On March 29, 2010, workers attached ET-136 to its solid rocket boosters. A crane lifted the ET into high bay No. 1 inside the VAB. The day-long process was completed around 18:00 EDT, as the tank was bolted to Atlantis's twin solid rocket boosters. Atlantis rolled out of its processing bay (OPF-1) around 07:00 EDT on April 13, 2010. The shuttle entered the VAB around 11:00 EDT for attachment to its external tank and solid rocket boosters. Given that this was at the time believed to be Atlantis' final rollover for a mission, the shuttle stopped for several hours en route to the VAB, allowing engineers and technicians to pose for photographs with the orbiter. The rollover occurred exactly 25 years after Atlantis first arrived at the Kennedy Space Center, after a cross-country trip from the shuttle factory in Palmdale, California. The path to the rollover was without any incidents of major concern, with only 22 Interim Problem Reports (IPRs) noted during Atlantis flow since its return from the STS-129 mission in November 2009. The transport canister containing the STS-132 payload arrived at Pad 39A on April 15, 2010, ahead of Atlantis rollover to the launch pad. The canister was shaped like the shuttle's -long payload bay. Packed inside it were the MRM-1 module and the cargo-carrying pallet ICC-VLD. Space Shuttle Atlantis began its rollout to launch pad 39A at 23:31 EDT on April 21, 2010. The complete shuttle stack and mobile launch platform were secured to the launch pad's structure at 6:03 EDT on April 22, 2010. The 3.4 mi () trek took 6 hours and 32 minutes to complete. The rollout was originally planned for the evening of April 19, 2010, but wet weather and thunderstorms on the Space Coast caused several delays. STS-132's payload was installed in the shuttle's cargo bay on April 25, 2010. Pad engineers preparing Atlantis had noticed paint peeling from shuttle's main payload, the MRM-1 module. Although the problem was declared to have no impact on the operation of MRM-1, it holds a potential threat of releasing debris