Boeing CST-100 Starliner flight directors Bob Dempsey and Edward Van Cise operate a simulated Orbital Flight Test-2 rendezvous and docking with the International Space Station from inside the Mission Control Center at NASA’s Johnson Space Center on Friday, April 23, 2021. As part of NASA’s Commercial Crew Program, OFT-2 is a critical developmental milestone on Boeing’s path to fly crew missions for NASA.