Expedition 15 was a long-duration International Space Station increment commanded by Fyodor Yurchikhin with Oleg Kotov as flight engineer. Sunita Williams transferred from Expedition 14 and returned on STS-117 Atlantis, which brought Clayton Anderson as her replacement. The increment supported station research, assembly, maintenance, three resident EVAs, and the STS-117 and STS-118 assembly flights. Yurchikhin and Kotov returned with Sheikh Muszaphar Shukor aboard Soyuz TMA-10, while Anderson transferred to Expedition 16.