US EVA-55

Expedition 60 Flight Engineers Nick Hague and Andrew Morgan of NASA will install the International Docking Adapter-3 (IDA-3) to Pressurized Mating Adapter-3 on the space-facing side of the station’s Harmony module. IDA-3 will provide a second docking port to the International Space Station to accommodate the future arrivals of Boeing CST-100 Starliner and SpaceX Crew Dragon commercial crew spacecraft. The docking port was launched to the station last month on a SpaceX Dragon on the company’s 18th commercial cargo resupply services mission to the station. IDA-2 was installed to the forward end of the Harmony module in the summer of 2016.