RIO DE JANEIRO, July, 6, 2016 (XINHUA) -- A National Force officer walks with a patrol dog in front of the Olympic Aquatics Stadium after the inauguration ceremony of the integrated security operation for Rio 2016 Games in Rio de Janeiro, Brazil, on July 5, 2016. Brazil's top security force officially assumed control of security at the venues for the Rio 2016 Games in a ceremony at Barra Olympic Park on Tuesday, one month prior to the Rio 2016 Olympic Games. (Xinhua/Li Ming)