Liable

If you run a program where you're authorizing "inexperienced" drone crews 8,000 miles away to make decisions on whether to drop bombs on a target, you can't completely blame them when they screw up and accidentally kill civilians.

If you create that sort of situation where mistakes like that are reasonably possible, the program (and those who authorized and operated it) is partially liable as well.

I recognize it's more politically expedient to blame "a few bad apples," but, unless they're acting maliciously, it's pretty wrong to pin all the blame on the guys on the ground.