Portugal's President Marcelo Rebelo de Sousa welcomes his counterparts from former colonies Angola, Mozambique, Guinea-Bissau, Cape Verde, Sao Tome and Principe and Timor-Leste for a ceremony in Lisbon marking 50 years since a military coup ended a decades-long dictatorship and 13 years of African colonial wars. "As we commemorate the 50th anniversary of April 25, the world is watching with concern the growth and proliferation of extremist movements, xenophobia, neo-Nazism, political intolerance and religious fundamentalism," Angolan President Joao Lourenco tells the crowd gathered in the Belem Cultural Centre to celebrate the Carnation Revolution's half-century. IMAGES AND SOUNDBITES