UN Has Been Ratcheting up Iran Sanctions
The U.N. Security Council first imposed sanctions against Iran in December 2006 and has been ratcheting up the punitive measures since then in hopes of pressuring the government to suspend enrichment and start negotiations on its nuclear program — which it has refused to do.
The council has acted in response to reports from the International Atomic Energy Agency, which is expected to release new details this week indicating possible secret work by Iran to develop nuclear weapons. It could lead to new sanctions.
Here is a rundown of the four sanctions resolutions adopted thus far: