NASA astronauts Bob Behnken and Suni Williams get suited up for a Boeing/United Launch Alliance emergency egress system demonstration at Cape Canaveral Air Force Station’s Launch Complex 41 in Florida on June 19, 2018. Behnken and other astronauts tested the system, which is designed to evacuate them safely in the unlikely event of an emergency on the launch pad on launch day. The Boeing CST-100 Starliner will launch on a ULA Atlas V rocket, carrying astronauts to the International Space Station.