jsc2025e070056 (Aug. 21, 2025) --- NASA astronaut Jack Hathaway reviews cardiopulmonary resuscitation (CPR) techniques during a medical emergency simulation as part of his training for NASA's SpaceX Crew-12 mission to the International Space Station. Surrounding Hathaway are various training support personnel at NASA's Johnson Space Center in Houston, Texas. Credit: NASA/Bill Stafford