Handout picture released by Cuban Agency ACN showing Cuban former President Fidel Castro (C) talking during the closing ceremony of the VII Congress of the Cuban Communist Party (PCC) at the Convention Palace in Havana, on April 19, 2016, as the Second Secretary of the PCC Jose Ramon Machado Ventura (R) and Cuban President Raul Castro listen. &quot;Cuba will never permit the application of so-called shock therapies, which are frequently applied to the detriment of society&#39;s most humble classes,&quot; said Raul Castro in a lengthy speech opening the congress, which takes place every five years and will stretch on for several days.  / AFP PHOTO / ACN / OMARA GARCIA MEDEROS / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT &quot;AFP PHOTO / ACN / OMARA GARCIA MEDEROS&quot; - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS  OMARA GARCIA MEDEROS/AFP/Getty Images ORIG FILE ID: 551132913