Wearing portable respirators, NASA astronauts Eric Boe, left, and Josh Cassada, participate in a joint emergency escape and triage simulation led by NASA, along with Boeing and United Launch Alliance, at Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on July 24, 2019. The simulation is one in a series in preparation for upcoming crew flights to the International Space Station as part of NASA’s Commercial Crew Program. Boe, Cassada and astronaut candidate Jasmin Moghbeli served as the flight crew. Cassada is currently in training for the second flight with crew aboard Boeing’s CST-100 Starliner spacecraft. The astronauts practiced emergency egress from the nearly 200-foot-tall crew access tower at the launch pad. They also rehearsed escape from the launch complex in an armored vehicle, and decontamination and triage at a nearby helipad.