The British computer specialist allegedly hacked into dozens of U.S. Army, Navy, Air Force, and NASA computers between 2001 and 2002 before his arrest. McKinnon said he was on a "moral crusade" to uncover secret knowledge of UFOs and alien technologies that could be used to save the environment. The U.S. claimed he undermined sensitive systems following 9/11. After his arrest in London, McKinnon was diagnosed with Asperger's Syndrome and the U.K. blocked his extradition to the U.S. because of it. A 10-year-legal battle over his fate ended in December 2012, when U.K. officials ruled he would not face charges there.