Security is always a concern for any major sporting event, and the upcoming Pan American Games to be held Guadalajara, Mexico, are no exception. According to a security assessment by the U.S. State Department's Overseas Security Advisory Council (OSAC) on the 2011 Pan American Games, approximately 100,000 visitors and as many as 5,500 athletes are expected to attend the events to be held in the city of 4.4 million. Athletes from 42 countries will compete in 46 sporting events in Guadalajara and several outlying venues. The opening and closing ceremonies will be held Oct. 14 and 30, respectively, in the Omnilife Stadium, adjacent to the athlete's village in northeast Guadalajara.