U.S. Air Force Senior Airman Travis Horstman, 86th Medical Support Squadron, repairs a Pulmonetic Systems LTV 1000 Series Ventilator, Ramstein Air Base, Germany, March 28, 2011. The ventilator provides continuous or intermittent breathing support for patients who require assisted ventilation. (U.S. Air Force photo/Airman 1st Class Brea Miller)