This is something to be concerned about and it slipped under the radar.
Washington: Air Force officials are struggling to wipe out a computer virus that has infected the ground control systems that guide Predator unmanned aerial vehicles and their successors.The control systems are based at Creech Air Force Base in Nevada. The famous Predators used by the CIA to kill terrorists are controlled from a different location with their own ground stations.
Air Force officials have not grounded any Predators or Reapers as a result of the virus, and operations continue unabated.
The attack is just the latest sign that modern warfare has gone online. “This should not come as a surprise to anybody. As long as remotely piloted aircraft rely on command controlled configurations, interference with the control mechanisms will be an issue…Read here: Defense