Astronaut Christina Koch poses with spacewalkers Andrew Morgan and Nick Hague

iss060e038215 (Aug. 21, 2019) --- NASA astronaut Christina Koch poses for a portrait with Andrew Morgan and Nick Hague in their U.S. spacesuits before beginning a six-hour and 32-minute spacewalk to install the orbiting lab’s second commercial crew vehicle docking port, the International Docking Adapter-3 (IDA-3). The IDA-3 will accommodate the future arrivals of Boeing CST-100 Starliner and SpaceX Crew Dragon commercial crew spacecraft.