Aerial views of Rio 2016 Olympic preparations

Little more than a year ago, International Olympic Committee Vice-President John Coates, described Rio de Janeiro's preparations for the 2016 Olympic and Paralympic Games as the "worst ever".

Wounded and spurred into action, organisers reacted positively and with just 12 months to go before the opening ceremony, few people here are in any doubt that the venues will be ready for competition.

The BBC's Wyre Davies takes a helicopter tour over the Brazilian city to survey the progress.