Rio's 'wall of shame'

On one side of the wall are the bright, new, welcoming Olympic façades for Rio 2016. On the other, a drug den guarded by armed traffickers.

Rio 2016 facing pollution challenge

Cleaning up the polluted Guanabara Bay where sailing and windsurfing competitions will be held at Rio 2016 remains a serious challenge, the International Olympic Committee president has said.

Dead fish clog Rio Olympic venue

Brazilian workers remove more than 33 tonnes of dead fish from a lagoon in Rio where Olympic rowing and canoeing events are due to take place in 2016.