Centers and health club locations worldwide, personal training, exercise classes.

Follow Agent Jack Bauer for 24 hours as he tries to save the country from various terrorist attacks. Features episode and charactor information, games and photos.

The 24-hour clock is a convention of time keeping in which the day runs from midnight to midnight and is divided into 24 hours, numbered from 0 to 23.

Get instant access to all the stories and videos we've published on CNN.com in the past 24 hours.