A human jawbone discovered in the Arizona desert was recently discovered to belong to a U.S. Marine Corps captain.
Maj. Shane Gentry used his real-world experience remotely piloting the MQ-9A in combat missions to train other Marines to fly the aircraft.
The Corps has 100 trained MQ-9A pilots but needs more.
Want to retire from the Marine Corps? The service now requires at least six months' heads up.
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