http://sports.ca.msn.com/world-cup/brazil-from-above-17
http://en.wikipedia.org/wiki/Est%C3%A1dio_do_Maracan%C3%A3#Rebuilding_for_the_World_Cup_2014_and_the_2016_Olympic_and_Paralympic_Games
http://en.wikipedia.org/wiki/Rio_de_Janeiro#Subway_and_urban_trains
http://en.wikipedia.org/wiki/2016_Summer_Olympics#Venues_and_infrastructure