epa04626428 Thousands of demonstrators participate in a rally called by Argentinean Prosecutors to pay hommage to Prosecutor Alberto Nisman in Buenos Aires, Argentina, 18 February 2015. Argentinian Prosecutor Alberto Nisman was fatally shot on 18 January 2015, on the eve of his appearance before Congress when he was due to table accusations against Argentinian President Cristina Fernandez de Kirchner and other senior officials, accusing them of a cover up over Iran’s alleged role in the 1994 attack on the AMIA Jewish community center in Buenos Aires, which caused 85 deaths. EPA/Ramiro Gomez