The US Military (and the military of other nations) are becoming more heavily invested in drones such as the Reaper and Predator.
The US Navy is moving ahead with its unmanned X47B program (above).
How survivable are these aircraft in a battlefield environment where the enemy isn't living in the Bronze Age, carrying 20th Century small arms? Take a look here (LINK) at Heartache Noise.
I don't know the answer to my question, I'm simply posing it for the sake of discussion.