Former U.S. Olympic athlete Michael Johnson, right, in his capacity as a member of the Chicago 2016 Olympic bid team, signs autographs for children at a local schools' Olympics at a stadium in Copenhagen, Wednesday, Sept. 30, 2009. Chicago is competing with Tokyo, Madrid and Rio de Janeiro for the right to host the 2016 Summer Olympic Games. The IOC will choose the winning city in a vote on Friday Oct. 2 in Copenhagen.