Four critics of Angola's President Joao Lourenco, who have recently been freed after more than a year in detention, attend a press conference in Luanda. "We are free, and our freedom is not due to grace," says activist Adolfo Campos, adding it was "Once again a political charm on the part of the President of the Republic, Joao Lourenco, for having left us where we were for a long time." IMAGES AND SOUNDBITES