A construction worker guides hooks into place on a 335,000 pound box truss during the construction of Hangar 7 aboard Marine Corps Air Station Miramar, Calif., Oct. 3. Hangar 7, an addition to Hangar 4, taxi ways and aircraft parking areas are under construction to accommodate future MV-22B Osprey squadrons . - A construction worker guides hooks into place on a 335,000 pound box truss during the construction of Hangar 7 aboard Marine Corps Air Station Miramar, Calif., Oct. 3. Hangar 7, an addition to Hangar 4, taxi ways and aircraft parking areas are under construction to accommodate future MV-22B Osprey squadrons .