Walz practices CPR in the U.S. Laboratory during Expedition Four

ISS004-E-8510 (11 March 2002) --- Astronaut Carl E. Walz, Expedition Four flight engineer, performs cardio-pulmonary resuscitation (CPR) on a jerry-rigged �human chest� dummy in the Destiny laboratory on the International Space Station (ISS). The image was taken with a digital still camera.