Boeing astronaut Chris Ferguson helps NASA astronauts Nicole Mann (left) and Mike Fincke (right) train for a spacewalk inside the International Space Station Airlock Mockup at NASA’s Johnson Space Center in Houston in February. Mann, Ferguson and Fincke are assigned to Boeing’s Crew Flight Test, Starliner’s first flight with crew as part of NASA’s Commercial Crew Program, which will restore human spaceflight launches to the space station from U.S. soil.