If keylogger software can infect these systems, how long will it be until another program captures more data from UAV surveillance missions?

FORBES: America's Drones Have Been Infected by a Virus

Mijangos allegedly then used the malicious software as a foothold to download additional viruses, including a keylogger that recorded his victims keyboard strokes.

FORBES: Man Accused Of Using Hacking For 'Sextortion'

That raises the possibility, at least, that secret data may have been captured by the keylogger, and then transmitted over the public internet to someone outside the military chain of command.

CNN: Computer virus hits U.S. drone fleet