File: UN's nuclear watchdog chief Yukiya Amano dies at 72 The UN's nuclear watchdog, the Interational Atomic Energy Agency, says that its chief, Yukiya Amano, who has been in poor health for some time, has died. "The Secretariat of the International Atomic Energy Agency regrets to inform with deepest sadness of the passing away of Director General Yukiya Amano," the IAEA said in a statement. FILE IMAGES