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Almeida died of a heart attack on September 11, 2009. On September 13, a memorial ceremony was held in the Plaza de la Revolución in Havana and several others were held across Cuba. A national day of mourning was declared, with flags flown at half mast. Fidel Castro, who had not been seen in public since resigning as president in 2008, sent a wreath that was placed alongside one from Raúl Castro. Other senior government and Communist Party members also attended.