A British man the U.S. federal government accuses of breaking into NASA and U.S. government computers is again fighting extradition from the UK to the U.S.  He stands accused of the "biggest military computer hack of all time," and the federal government continues to try and have him extradited to stand trial.

Gary McKinnon, 43, who admitted to the data intrusion, and his attorneys claim he is too ill to travel to the United States to stand trial over the hacking charges according to the BBC.  McKinnon suffers from Asperger's Syndrome, and could face increased chance of suicide or mental illness if sent overseas, according to his lawyers.

McKinnon, who broke into Pentagon and NASA servers in 2001 and 2002, said he was simply looking for signs of a U.S.-led cover-up of alien life. In addition, he is supposedly "an eccentric person who has passionate views about UFOs," according to one of his lawyers.

After originally being arrested in 2002, McKinnon and his attorneys have done their best to make sure he hasn't been extradited yet.  Both the House of Lords and European Court of Human Rights have approved McKinnon's extradition, so it's extremely likely he'll find his way towards the U.S. at some point in the future depending on the outcome of his most recent extradition hearing.

If he isn't extradited and instead faces prosecution in the UK, he'll likely receive a much more lenient sentence than if he were extradited to face charges in the US.  It's possible he could spend up to 70 years in federal prison.

The matter is now headed towards a judicial review in which McKinnon's lawyers will present their case home secretary Jacqui Smith.