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STS-115
STS-115 was a Space Shuttle mission to the International Space Station (ISS) flown by Space Shuttle '' Atlantis''. It was the first assembly mission to the ISS after the ''Columbia'' disaster, following the two successful ''Return to Flight'' missions, STS-114 and STS-121. STS-115 launched from Pad 39-B at the Kennedy Space Center on 9 September 2006 at 11:14:55 EDT (15:14:55 UTC).
The mission is also referred to as ISS-12A by the ISS program. The mission delivered the second port-side truss segment (ITS P3/P4), a pair of solar arrays (2A and 4A), and batteries. A total of three spacewalks were performed, during which the crew connected the systems on the installed trusses, prepared them for deployment, and did other maintenance work on the station.
STS-115 was originally scheduled to launch in April 2003. However, the ''Columbia'' accident in February 2003 pushed the date back to 27 August 2006, which was again moved back for various reasons, including a threat from Tropical Storm Ernesto and the strongest lightning strike to ever hit an occupied shuttle launchpad.
==Crew==
Note:The P3/P4 Truss segment and batteries were so heavy (more than 17.5 short tons, or roughly 16 metric tons) that the crew count was reduced from seven to six.〔 〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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