The Las Vegas-based group "Go Topless" is holding topless rallies in San Antonio this afternoon.

The group advocates for women's right to be topless in public, and is holding similar rallies in more than 50 cities around the world.

Just one problem. At least in San Antonio, there is an ordinance that forbids the "exposure of female breasts." San Antonio police say they'll wait to see how the event turns out before deciding if they need to take any action.