Keywords: US Navy 110810-N-ZB612-194 Chief of Naval Operations (CNO) Adm. Gary Roughead debarks F Constituicao (F 42) during a visit to Rio De Janeiro.jpg en RIO DE JANEIRO Aug 10 2011 Chief of Naval Operations CNO Adm Gary Roughead debarks the Brazilian navy frigate F Constituicao F 42 during a visit to Rio De Janeiro U S Navy photo by Chief Mass Communication Specialist Tiffini Jones Vanderwyst/Released 2011-08-10 110810-N-ZB612-194 Navy http //www navy mil/view_image asp id 105618 U S Navy photo by Chief Mass Communication Specialist Tiffini Jones Vanderwyst PD-USGov-Military-Navy United States Navy images from Rio de Janeiro Brazil |