OLD ENEMIES NEVER DIE Cuba and the United States are in talks to normalize relations, something the old guard on the Communist-controlled island has vowed to stop--by any means necessary. Zayda de la Guardia, a rogue general in the Cuban security services, has gotten his hands on a nuclear weapon left over from the Cold War. He plans to launch it on Miami, an attack that could kill millions. There's just one thing standing in his way:...