The CIA has lost one of its most valued former spies.
Iranian nuclear scientist Shahram Amiri, who defected to the US, is now on his way back home to Tehran after a very messy and public re-defection.
ABC News obtained exclusive photos of Amiri leaving Washington's Dulles International Airport late Tuesday night on a commercial flight to Doha, Qatar, en route to Iran.
Amiri was escorted directly to the jetway entrance by a security officer. He was flanked by what appeared to be a U.S....Full Story