The top U.S. general in the Middle East says Iran is the "greatest threat" in the region, but added only an internal uprising could halt its nuclear weapons program. American military strikes would delay Tehran's pursuit of atomic weapons, but "only the Iranian people can stop this program," U.S. Central Command chief Gen. James Mattis told senators.
Meantime, Defense Secretary Leon Panetta contends the Obama administration is determined to prevent Iran from building a nuclear bomb. Washington's final plans are increasingly anyone's guess. Read more here.