Iranian state television on Thursday quoted President Mahmoud Ahmadinejad as saying: "If we do want to make a bomb, we are not afraid of anybody."
Iran has long insisted that its nuclear programs are peaceful and meant only to generate power for a future nuclear reactor network.
But the U.N. Security Council has passed four sets of sanctions against Iran for refusing to freeze activities that could be used in a weapons program.
The U.N. says Iran also blocked an IAEA probe into allegations of secret experiments that could reflect attempts to develop an arms program. (read more)