This is definitely going to go “Terminator” on us!
The drones have become self aware. We have 20 minutes.
It currently looks like this is a regular virus, which got into the classified network, possibly by use of a flash drive. Given the amount of havoc which the Stuxnet was able to inflict upon Iran's nuclear program, I'm not comfortable that armed drones may be vulnerable to similar hacking by our enemies.
In the past, I brought up the "Battlestar Galactica" scenario (hostile agent inserts malware which disables your combat systems at a critical moment in an attack) and was poo-pooed by people here who said that security measures would prevent that scenario from occurring. The scenario can no longer be considered far-fetched.