Cuban revolutionary leader Fidel Castro (L) and Cuban President Raul Castro, take part during the seventh Congress of the Communist Party of Cuba (PCC), at the Palace of Conventions, in Havana, Cuba, on April 19, 2016. Cuban leader Raul Castro was re-elected the first secretary of the Central Committee of Communist Party of Cuba (PCC) at the the final plenary session of PCC's seventh Congress, Cuba's official state news agency Prensa Latina reported. [Photo/Xinhua]