iss056e078440 (July 5, 2018) --- Astronaut Alexander Gerst practices cardiopulmonary resuscitation (CPR) as cosmonaut Sergey Prokopev looks on during an emergency training session aboard the International Space Station. The onboard training provides crewmembers the opportunity to review safety procedures, communication methods and hardware necessary to manage a medical emergency.
Photographer Alex Gerst
Date July 5, 2018