TIME Interviews Dozens of Insurgents and Disgruntled Iraqis, Attends Resistance Meetings and Views Videotape of Attacks Against Coalition Forces Guerillas Trying to Drive U.S. Casualties So High That American Public Turns Against The War – ‘They Could Succeed,’ Pentagon Official Says New York -- U.S. intelligence experts now believe the Iraq insurgents are a volatile mix of groups and free-lancers who include loyalists of the former ruling Baath Party, Fedayeen militiamen, former Republican Guard and intelligence agents, foreign jihadis, professional terrorists, paid common criminals and disaffected Iraqis, TIME's Brian Bennett and Michael Ware report from Iraq. Over the past three...