U.S. Diplomat Says Transition Under Way in CubaFri Mar 29, 2:49 AM ETBy Anthony Boadle WASHINGTON (Reuters) - The Bush administration has stepped up support for a growing dissident movement in Cuba in an effort to speed up a peaceful transition to democracy, the top U.S. diplomat on the island said on Thursday. "The transition, in fact, is under way. I believe it started when (President) Fidel Castro (news - web sites) fainted in public," Vicki Huddleston, chief of the U.S. interests section in Havana, told reporters on a visit to Washington. The momentary collapse of the 75-year-old leader in...