The Crown Prosecution Service has announced that computer hacker Gary McKinnon, whose extradition to the US was blocked, will not face charges in the UK, bringing to an end a 10-year legal battle. But who is Mr McKinnon?
In March 2002 Glasgow-born Mr McKinnon was arrested by police at his dingy flat in Wood Green, north London.
Scotland Yard detectives were acting on allegations from the Americans that he had hacked into US military computer systems in an attempt to bring them down.
He allegedly immobilised sensitive systems in the wake of the 9/11 attacks.
Mr McKinnon, now 46, admits hacking into US computers but says he had been on a "moral crusade" to find classified documents about Unidentified Flying Objects (UFOs).
