Bad Religion performed this past weekend at the Reason Rally in Washington, DC. Opening up the event, frontman, Greg Graffin, sang the national anthem. Later in the day Bad Religion played a full set. Some user video of Greg's rendition of the "The Star-Spangled Banner" and some select songs of their set can be seen below.
The event was (self-) described as the "largest secular event in world history," with other guests including evolutionary biologist Richard Dawkins, biologist PZ Meyers, magician and noted skeptic James Randi, as well as Adam Savage of Mythbusters.