The tensions between Iran and Western countries, especially with US started to rise in 2003. Since then, Western countries and US have tried to dismantle the Iran’s nuclear program (INP), insisting that in the framework of the INP, Tehran could conduct studies on nuclear weapons. Despite the fact that Iranian highlevel authorities officially denied any activity in the nuclear weapon design, the Western countries and US initiated the nuclear talks in P5+1 Group (US, UK, France, Germany, Russia, China and Germany).