The U.S. and Iran have a long history of tensions, including a CIA-led campaign to topple Iran's prime minister in 1953 and the taking of American hostages in 1979. The U.S. attacks on Iran over the weekend, in conjunction with the Israeli military, marked a stunning new phase in relations between the two countries. But it is hardly the first time Washington and Tehran have clashed politically and militarily. He... [5811 chars]