Paul Raphael Hall, aka Hassan Abujihaad, a Navy signalman who was honorably discharged in 2002, was arrested and charged in 2007 with providing classified information on ship movements to al-Quaida operatives. He was convicted of espionage in 2008, and sentenced to 10 years in prison.
(From: https://www.dhra.mil/PERSEREC/Espionage-Cases/2005-08/)