HAVANA (Reuters) - Robert Redford (news) showed his new film about Che Guevara, "The Motorcycle Diaries," to the widow and children of the legendary guerrilla fighter on Sunday. "I came to present the film that I produced on Che Guevara and I am very happy to be in Cuba," Redford told Reuters before the private screening at Havana's Charles Chaplin cinema theater. He watched the film with Guevara's widow Aleida, daughter Aleidita and son Camilo, as well as Ramiro Valdes, a top military commander in Cuba's communist government who fought with Guevara and Fidel Castro (news - web sites) in...