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Drones Most Accident-Prone U.S. Air Force Craft: BGOV Barometer

The U.S. military’s three biggest drones, made by Northrop Grumman Corp. and General Atomics Aeronautical Systems Inc., are the most accident-prone aircraft in the Air Force fleet.

The BGOV Barometer shows Northrop’s Global Hawk and General Atomics’s Predator and Reaper unmanned aerial vehicles have had a combined 9.31 accidents for every 100,000 hours of flying. That’s the highest rate of any category of aircraft and more than triple the fleet-wide average of 3.03, according to military data compiled by Bloomberg.