Cuba's Defense Minister General Julio Casas Regueiro stands beside Revolution Commander and Cuba's Vice President Ramiro Valdez (L) during the closing ceremony of Cuban communist congress in Havana April 19, 2011. Regueiro, Cuba's defense minister and longtime aide to President Raul Castro, died on Saturday of heart failure at the age of 75, the Cuban government said. It declared Monday a day of national morning for the former bank accountant who rose to become one of the country's most powerful men. Picture taken April 19, 2011. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS OBITUARY)