Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. 'Missing' Iranian Nuclear Scientist Arrives in Tehran David Dyar 14 July 2010 APTN video still shows Iranian scientist Shahram Amiri during interview Photo: APTN APTN viideo still shows Iranian scientist Shahram Amiri during interview, 13 July 2010 An Iranian nuclear scientist has returned to Tehran from the United States after disappearing more than a year ago and mysteriously re-emerging in Washington. Government officials and his family, including his wife and seven-year-old son, greeted Shahram Amiri upon his arrival at Imam Khomeini International Airport early Thursday. Before leaving Washington, Amiri echoed the Iranian government's claims that he had been abducted at gunpoint while visiting Saudi Arabia and handed over to U.S. intelligence agents.  The United States has denied kidnapping Amiri as well as speculation that the Iranian national had defected to the United States and was working with the CIA. In Iran, Amiri had worked for the country's Atomic Energy Organization, which the U.S. and its allies suspect is trying to develop nuclear weapons, a charge Iran denies.  On Tuesday, U.S. Secretary of State Hillary Clinton said the scientist was in the United States voluntarily and was free to leave.  U.S. State Department spokesman P.J. Crowley said there is no information to suggest the Iranian national was mistreated during his stay in the United States. Crowley acknowledged U.S. authorities were in contact with Amiri during his stay, but did not disclose the nature of their communication. He also suggested that Amiri's future comments be viewed with "a grain of salt". On Monday, the scientist turned up at the Pakistani embassy office that handles Iranian interests in Washington. Amiri left Iran in June 2009. Multiple videos turned up on the Internet last month purporting to show Amiri, in one case saying he was kidnapped by the U.S., in another saying he had escaped from American intelligence, and in a third saying he was free and safe and studying in the United States. In March, ABC News reported that Amiri defected to the U.S. and was assisting the CIA in efforts to undermine Iran's nuclear program. The U.S cut diplomatic ties with Iran after the 1979 Islamic revolution.[ ] [Some information for this report provided by AFP and Reuters.] .