In this Nov. 19, 2013 file photo small boats sit on the shore of Guanabara Bay in the suburb of Sao Goncalo, across the bay from Rio de Janeiro, Brazil. Brazil will not make good on its commitment to clean up Rio de Janeiro’s sewage-filled Guanabara Bay by the 2016 Olympic Games, state environmental officials acknowledged in a letter obtained Saturday May 17, 2014 by The Associated Press. (AP Photo/Felipe Dana, File)