page_title: Expedition 15
hierarchical_section_title: Expedition 15
caption_attribution_description: Expedition 15 crewmembers posed for photos at the conclusion of a Dec. 13 press conference at the Johnson Space Center. From the left are astronaut Clayton C. Anderson, flight engineer; along with cosmonauts Oleg Kotov, flight engineer and Soyuz commander; and Fyodor Yurchikhin, commander. Kotov and Yurchikhin represent Russia's Federal Space Agency.
context_page_description: Expedition 15 was the 15th expedition to the International Space Station. Four crew members participated in the expedition, although for most of the expedition's duration only three were on the station at any one time. During Expedition 15, the ISS Integrated Truss Structure was expanded twice: STS-117 brought the S3/S4 truss, and STS-118 brought the S5 truss.
context_section_description: Expedition 15 was the 15th expedition to the International Space Station (ISS). Four crew members participated in the expedition, although for most of the expedition's duration only three were on the station at any one time. During Expedition 15, the ISS Integrated Truss Structure was expanded twice: STS-117 brought the S3/S4 truss, and STS-118 brought the S5 truss.
caption: ISS expeditions
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