laura westbrook has more. >> the tanks rolled in before dawn and drove out the drug you -- drug lords. officers0 police and entered. hidden in the bushes, they found bullets and stashes of drugs. hour, controln was placed into the hands of a police unit. it is part of a police program to make the city safer. has been tainted by accusations that police tortured and murdered a man after interrogating him. police are learning from these events. this isolated case will not affect the classification process and rio de janeiro. week, police activity resulted in the death of an officer into drug traffickers. this is supposed to be a peaceful off for -- peaceful operation and, on the whole, it was. the police are now in control the police are now in control and the drug lords are gone. there is still a threat. they will be back. laura westbrook. >> for more on the preparation for the world cup, long onto the bbc website. -- log on to the bbc website. >> john kerry as that of the syrian government deserves credit for what they termed the rapid compliance to a monet chemical weapons. syrian off