Military drones have slammed into homes, farms, runways, highways, waterways and, in one case, an Air Force C-130 Hercules transport plane in midair. No one has died in a drone accident, but the documents show that many catastrophes have been narrowly averted, often by a few feet, or a few seconds, or pure luck.

“All I saw were tents, and I was afraid that I had killed someone,” Air Force Maj. Richard Wageman told investigators after an accident in November 2008, when he lost control of a Predator that plowed into a U.S. base in Afghanistan. “I felt numb, and I am certain that a few cuss words came out of my mouth.”…

Several military drones have simply disappeared while at cruising altitudes, never to be seen again. In September 2009, an armed Reaper drone, with a 66-foot wingspan, flew on the loose across Afghanistan after its handlers lost control of the aircraft. U.S. fighter jets shot it down as it neared Tajikistan.