Cuba's Minister of Communication and Commander of the Revolution Ramiro Valdez signs envelopes of the Cuban Five postal stamps during the stamps' launch in Havana September 12, 2007. The launch of the stamps is part of a new international campaign for the liberation of five Cuban men convicted in the U.S. on conspiracy and espionage charges for spying on behalf of Fidel Castro's government. REUTERS/Claudia Daut (CUBA)