Algerian Ahmed Ressam was convicted in 2001 of conspiracy to commit a terrorist act and smuggling explosives.
As he was providing details about al-Qaeda training in Afghanistan at the time, he was not sentenced.
But he was sentenced in 2005 after he stopped co-operating. The appeals court said he should get a longer sentence.
Full Story: http://news.bbc.co.uk/2/hi/americas/8494540.stm