 After a technical evaluation of the nine original bids, the top five were shortlisted on 18 May 2004, becoming official candidates. The remaining applicant cities — Havana, Istanbul, Leipzig and Rio de Janeiro — were eliminated. Four of the five candidate cities were prominent national capitals, which lent an increased competitive interest to the final bidding phase. Paris and Madrid earned the top scores during the application phase, but in early 2005, a more thorough evaluation of the candidates put Paris and London in a close race that became tighter as the final vote approached. On 6 July 2005, in a four-round exhaustive ballot of the IOC (gathered at the 117th IOC Session in Singapore), Moscow, New York City and Madrid were eliminated in the first three rounds. London won the final round by a margin of four votes over Paris and secured the right to host the 2012 Olympics.
