Sen.
Joseph Biden and Iran's foreign minister clashed Friday over Tehran's nuclear ambitions, with Biden hinting at the possibility of armed conflict unless fears of an Iranian weapons program were put to rest. The rare and frank public exchange between a senior American politician and a ranking member of the Iranian government came at a dinner during the World Economic Forum held in this Alpine resort town. Biden, D-Del., favors dialogue with Iran and as a member of the Senate Foreign Relations Comittee has occasionally met with officials from the Islamic Republic. He is at odds with administration hard-liners who favor isolating Iran for its supposed nuclear weapons plans and alleged backing of terrorists. snip