Representatives from the four cities bidding for the 2016 Olympic Games will make presentations today and Thursday to the International Olympic Committee in Lausanne, Switzerland.
The IOC will select a site on Oct. 2 in Copenhagen, Denmark.
Around the Rings, a publication that covers the business of the Olympics, gives Chicago a slight lead. Chicago scored 80 of a possible 110 points in a power index, followed by Madrid with 78. Rio de Janeiro and Tokyo tied for third with 77.
"For the members, it's the opportunity to get a presentation without the frills," IOC president Jacques Rogge said in an interview with The Associated Press. "There will be no heads of states, no flashy videos, no presentation of fancy athletes. We can enter into more detailed questions."