Luis Posada Carriles, an aging anti-Castro militant and prison escapee wanted by Cuban authorities as a terrorist, was seized by federal immigration officials in Miami on Tuesday. Now the Bush administration, which has pursued both the war on terrorism and a hard-line policy against Fidel Castro’s regime, must decide what to do amid growing international demands that Posada be held accountable for his past — including his alleged role in an airliner bombing more than 30 years ago.Full Story