"I do not support military action against Iran, but the world must become a united front and impose harsh economic sanctions on Iran," President Shimon Peres said Friday. Speaking at the Ambrosetti Forum, an annual gathering of global political and business leaders in this Italian lakeside resort, Peres said that most of the Arab states were opposed to Iran having nuclear weapons, and the world at large would not allow terrorists and extremists to have nuclear weapons of mass destruction at their disposal.