The US wants a new resolution from the UN Security Council to increase sanctions against Iran for its continued enrichment of nuclear fuel. In Washington today, officials from France, the UK, Russia, China and Germany are meeting with Nicholas Burns, a top State Department aide. President Bush has threatened "financial isolation and/or economic sanctions" if diplomacy doesn't work. But he's also said that, "Iran's actions threaten the security of nations everywhere" and, "we will confront this danger before it's too late." We look at the pros, cons and possibilities of military action—by choice or by accident.