"Gary Mckinnon is a British hacker who went unnoticed for years hacking NASA, the US Army,US Navy, Department of Defense, and the US Air Force. Considered the biggest military computer hack of all time, Mckinnon was looking for evidence of UFOs, antigravity technology, and the suppression of “free energy”. US authorities claim he deleted critical files from operating systems, which shut down the US Army’s Military District of Washington network of 2,000 computers for 24 hours, as well as deleting US Navy Weapons logs, rendering a naval base’s network of 300 computers inoperable after the September 11th terrorist attacks. They claim the cost of tracking and correcting the problems he caused was $800,000.
McKinnon has denied causing any damage, arguing that, in his quest for UFO-related material, he accessed open, unsecured machines with no passwords and no firewalls and that he left countless notes pointing out their many security failings. He adamantly disputes the damage and the financial loss claimed by the US as concocted in order to create a dollar amount justifying an extraditable offense."