up to 14 kW of heat into space. The PVR weighs 1,633 pounds and when deployed measures 44 by 12 by . The AJIS provides the structural transition between S3 and S4 structures. S4 contains the passive side of the MRTAS which provides the structural attachment for S5 on S4. S4 was delivered to the Space Station Processing Facility at Kennedy Space Center on January 15, 2001. Hydrogen Vent Valve Atlantis carried a Hydrogen Vent Valve in its mid-deck to the space station. The valve used to vent Hydrogen overboard is part of the oxygen generating system (OGS). The OGS helps to produce oxygen for the crew to replace oxygen lost due to experiment use, airlock depressurization and venting. Other items Other items carried on the mid-deck included a contingency water container for transferring water to the ISS, a tool "modified torque multiplier" for removing S3 launch restraints and audio interface hardware to troubleshoot shuttle-to-station communication difficulties experienced during STS-115 and STS-116. The payload weight for the mid-deck during STS-117 was less than 1,000 pounds. Among numerous cargo, Atlantis carried into space an almost 400-year-old artifact (a metal cargo tag) etched with the name of its destination "Yames Towne" from historic Jamestown along with four commemorative coins to honor early American explorers. A 17th-century metal worker had prepared a tag to mark cargo heading for the New World. The tag was unearthed in 2006 at Jamestown, the location of the first permanent English settlement in the Americas in 1607. A comprehensive list of STS-132 items that will be carried aboard Atlantis and their descriptions can be found in the Official Flight Kit. Mission background The mission marks: 149th crewed US space flight 118th shuttle mission since STS-1 28th flight of Atlantis 21st shuttle mission to the ISS 1st shuttle flight in 2007 93rd post-Challenger mission 5th post-Columbia mission Shuttle processing STS-117 was originally planned to launch on March 16, but the launch date was later moved forward in order to extend the launch window and increase the chances of a successful launch within that time frame. In preparation for this earlier launch date, Atlantis was transported to the Vehicle Assembly Building on February 7, 2007. First motion was at 06:19 EST. Following the arrival of the shuttle in the assembly facility, Atlantis was fitted with two bridge cranes that lifted her vertically, to position her for mating to the external