The largest hack in U.S military history may have been conducted by... The NSA. In 1997, a wargame conducted by the NSA showed just how unprepared we were for a potential cybernetic strike- in 4 days, NSA hackers were able to take down entire military networks. It revealed the dire consequences of a possible cyberattack, and even more alarming- it revealed a third actor, quietly hiding in the shadows...