“Cashatt didn’t have a keycard. Instead, he reached underneath the lock on the door until his finger found a small, circular port and inserted the plug of his device. Then he held a frayed wire coming off the board to one end of the battery, completing an electric circuit. Instantly, the lock whirred as its bolt retracted, and a green light flashed above the door handle. For a moment, Cashatt stared in shock, almost disbelief. ‘It was like the heavens had opened,’ he’d say of the moment years later.” Wired’s Andy Greenberg takes you Inside an Epic Hotel Room Hacking Spree.