They get captured
It can cost the country that hosts it millions, even billions of pounds.
They usually gather all the countries and have a vote for whichever country hosts the Summer and Winter Olympics
The next Olympics will be held in Brazil and it will be at 2016
There are no Olympics in 2013. The Olympics were in 2012 and the next one is in 2016. There are winter Olympics in 2014.
Rio de Janeiro, Brazil will host the next Olympics in 2016.
They do a bid and whichever city (and in some cases resorts) has the "best" place to host the Olympics. The winner of the Bid gets to hos the Olympics.
The next summer Olympics in 2012 will be held in London.
The 2012 Olympics will be held in London.