By 15 July 2003 , the deadline for interested cities to submit bids to the International Olympic Committee ( IOC ) , nine cities had submitted bids to host the 2012 Summer Olympics : Havana , Istanbul , Leipzig , London , Madrid , Moscow , New York City , Paris and Rio de Janeiro .
By the bid submission deadline of 15 July 2003 , nine cities had submitted bids to host the 2012 Olympics .