If bombs start falling on Iraq, peace activists say, expect insurgency at home. Demonstrators are planning to shut down San Francisco's Financial District, to gather by the thousands in New York's Times Square and stage sit-ins in Washington, D.C. Others are ready to try to breach security at Vandenberg Air Force Base in Southern California, where many of the military targeting operations will be done for an Iraq bombing campaign. They're going not just to protest, but to interfere. "We have the possibility of disrupting operations that feed directly into the Iraq war in a limited but very real way,"...