U.N. nuclear chief Yukiya Amano arrives in Iran on mission to resume inspections of suspect sites (AP) TEHRAN, Iran - The head of the U.N. nuclear agency has arrived in Tehran on a key mission that could lead to the resumption of probes on whether Iran has secretly worked on a nuclear weapon. International Atomic Energy Agency chief Yukiya Amano and his two aides landed early Monday morning in Iran but were quickly whisked away from the Tehran airport. They are to meet Iran's top nuclear negotiator, Saeed Jalili, as well as the foreign minister and other Iranian officials later in the day. Iran, Syria among top for G-8 and NATO Poll: Opposition to Iran going nuclear widespread U.N. nuclear chief to visit Iran on inspections The visit is focused on getting Iran to agree to terms that will allow IAEA probes of suspect Iranian sites. Tehran denies having worked on atomic weapons. Amano's trip comes ahead of another round of nuclear talks between the six world powers and Iran on Wednesday in Baghdad.