CLEAN: 7 Cameroon athletes 'defect' at London Olympics: report

The transcript discusses athletes reported missing who have valid visas until November. Authorities have been informed, and a response is planned, but legal action is limited until the athletes breach their visa rights. The discussion also references past behavior of athletes in similar situations.

What challenges are mentioned in relation to the athletes' situation?

How does the text describe the behavior of the athletes in the past?