Some athletes expressed concern about invasion of privacy and the use of overaggressive personnel to collect urine samples.

Foyle said, "An athlete shouldn't express his opinion based on the opinion of an athlete."

This was the first time that athletes played a leading role in a Congress and could express their opinions on the issues under discussion.

American athletes express their feelings, sometimes for good, sometimes not.

For a year, athletes expressed their concerns.

"Any time an athlete like Deion expresses an interest we're going to explore that the best way we can," Shula said.

Following the 2008 Mumbai attacks, some athletes and their representative bodies expressed security fears during the games.

Some Kenyan athletes have also expressed concern that their Olympic performances could be compromised by spending too much time training in the heat and humidity.

However, some athletes have already expressed their wish to represent either the Netherlands or Aruba in London).

Our reporters who have interviewed Olympic athletes in the past few months have indicated that most athletes aren't expressing any serious concerns about the pollution.