Viewers who watch closely will find a URL at the bottom of the screen that leads to Recruitahacker.net. From there, the user can enter rudimentary commands and access a hacking puzzle. Lt. Gen. Paul M. Nakasone told reporters at Defense One's Tech Summit on Thursday that of the 9.8 million people who viewed the ad online, 800,000 went on to attempt the hacking test. Only 1% passed.