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KENNEDY SPACE CENTER, FLA. - A dive boat is moored to the Life Support Buoy, anchored above the NOAA undersea station Aquarius, offshore from Key Largo. Underwater is the NASA Extreme Environment Mission Operations 6 (NEEMO-6) mission team: (left to right) Tara Ruttley, a biomedical engineer, and astronauts Nick Patrick, John Herrington and Doug Wheelock. The NEEMO-6 mission involves exposing an astronaut/scientist crew to a real mission experience in an extreme environment - Aquarius - to prepare for future space flight. Spacewalk-like diving excursions and field-tests on a variety of biomedical equipment are designed to help astronauts living aboard the International Space Station. To prepare for their 10-day stay, the team had dive training twice a day at the Life Support Buoy.