This July 27, 2015 aerial photo shows the Rodrigo de Freitas Lake in Rio de Janeiro, Brazil.
This July 27, 2015 aerial photo shows the Rodrigo de Freitas Lake in Rio de Janeiro, Brazil. Leo Correa AP
This July 27, 2015 aerial photo shows the Rodrigo de Freitas Lake in Rio de Janeiro, Brazil. Leo Correa AP

AP investigation: Human sewage in Rio water a threat at 2016 Olympics

July 30, 2015 07:12 AM