FILE PHOTO -- Pararescuemen do a "fast ropefrom a hovering HH-53. The HH-53 Super Jolly Green Giant helicopter was used extensively during the Vietnam War for special operations and rescue of combat personnel. During past space programs, the HH-53 was on duty at the launch site as the primary astronaut recovery vehicle. Under the Air Force's Pave Low IIIE program, nine MH-53Hs and 32 HH-53s were modified for night and adverse weather operations and designated MH-53Js. Their modifications included forward-looking infrared, inertial global positioning system, Doppler navigation systems, a terrain-following and terrain-avoidance radar, an on-board computer and integrated avionics to enable precise navigation to and from target areas. (U.S. Air Force photo by Master Sgt. Dave Nolan)
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