After three for the four bid cities have presented: The Obamas produced an inspired double act on peace and lighting up lives for Chicago, Tokyo promised a green Games that would be the example for the world's major cities, and Rio assured the IOC of a safe and financially secure Games that would inspire the whole continent.
Rio de Janeiro will be the first South American city to host the Olympics after winning an historic vote to stage the 2016 Games at the IOC session in Copenhagen.
The first lady, Michelle Obama, will be a key speaker for Chicago 2016 at the final, and vital, presentation to the IOC members in Copenhagen on Friday morning (445pm AEST).
One of the tightest and most hard-fought battles to win the right to host an Olympic Games will come to its eagerly-anticipated climax in Copenhagen this week
Rio Janeiro and Chicago's chances of hosting the 2016 Olympic Games have received a boost after they appeared to edge ahead in the technical evaluation of the four candidates.
The four candidate cities bidding to host the Games of the XXXI Olympiad in 2016 - Chicago (USA), Tokyo (Japan), Rio de Janeiro (Brazil) and Madrid (Spain) all presented to IOC Members