Shahram Amiri, an Iranian nuclear scientist who disappeared a year ago, holds his 7-year-old son Amir Hossein as he arrives at the Imam Khomeini airport just outside Tehran Thursday, July 15, 2010. Iranian news agencies reported Wednesday that Mr. Amiri provided valuable information on the CIA. (AP Photo/Vahid Salemi)

Photo by: Vahid Salemi

Shahram Amiri, an Iranian nuclear scientist who disappeared a year ago, holds his 7-year-old son Amir Hossein as he arrives at the Imam Khomeini airport just outside Tehran Thursday, July 15, 2010. Iranian news agencies reported Wednesday that Mr. Amiri provided valuable information on the CIA. (AP Photo/Vahid Salemi)