The forecast for August 26th in Philadelphia is calling for hot temperatures, sunshine (because it's always sunny in Philadelphia), and thousands of bare butts on bicycles. About 3,000 people are expected to participate in this year's Philly Naked Bike Ride. The nude cycling event through the City of Brotherly Love is a 10-mile ride that takes naked riders past all of Philly's famous landmarks, like Independence Hall, the Liberty Bell, and of course the Rocky steps at the Philadelphia Museum of Art. Organizers of the event say they do it to promote fuel conservation and positive body image. The starting location and the route won't be announced until the day before.