(8. November) In fact, fatigue from piloting military drones in surveillance and kill missions is so debilitating that the US Air Force had to cut down on the number of daily drone flights it scheduled in 2015, because so many burned-out pilots chose to quit their jobs. The US Air Force is now offering $125,000 (£100,860) bonuses to get drone operators to sign on for five-year contracts, but it‘s still not enough.