Davis-Monthan Air Force Base, Arizona

The 309th Aerospace Maintenance and Regeneration Group (AMARG) at Davis-Monthan operates the largest aircraft "junkyard" in the world, a 2,600-acre site with typically around 4,200 military aircraft belonging to all branches of the U.S. military. Some are stored as part of a mothball fleet, while some perfectly good aircraft are destroyed to comply with arms reduction treaties. For example, in the early 1990s, 350 flyable B-52 bombers were destroyed at the site. Each aircraft was chopped into four pieces with a blade dropped from a crane, and left out for 90 days so their destruction could be confirmed by Russian satellites. Davis-Monthan is also an active base, that is home to fighter units and other Air Force support units, including a contingent of MQ-1 Predator and MQ-9 Reaper drones.