Olympics 2020: The view from the candidate cities
7 September 2013 Last updated at 18:41 BST
The cities bidding to host the 2020 Olympics and Paralympics have been revealing their presentations and describing why they should stage the Games.
Istanbul, Tokyo and Madrid are the contenders in a secret ballot that will be announced at 21:00 BST on Saturday.
BBC correspondents James Reynolds in Istanbul, Toim Burridge in Madrid, and Rupert Wingfield-Hayes in Tokyo explain why each of the three cities would like to win the chance to host the Games in 2020.