The unmanned craft were rushed into use in 2001 and some design and system problems were never fully addressed. Losses don't involve lives but are expensive.
The U.S. military often portrays its drone aircraft as high-tech marvels that can be operated seamlessly from thousands of miles away. But Pentagon accident reports reveal that the pilotless aircraft suffer from frequent system failures, computer glitches and human error.
Design and system problems were never fully addressed in the haste to push the fragile plane into combat over Afghanistan shortly after the Sept. 11 attacks more than eight years ago. Air Force investigators continue to cite pilot mistakes, coordination snafus, software failures, outdated technology and inadequate flight manuals.
Thirty-eight Predator and Reaper drones have crashed during combat missions in Afghanistan and Iraq, and nine more during training on bases in the U.S. — with each crash costing between $3.7 million and $5 million. Altogether, the Air Force says there have been 79 drone accidents costing at least $1 million each.