I'm figuring that C-Span thought that the Beck image would not only cover for the sparse crowds but also convey the false notion that today's crowd wasn't made up of a bunch of Commie lovin' Kooks.
Unfortunately for them, they got caught. Next stop for this story, "Fox News Watch".
De nada.
“... but also convey the false notion that today’s crowd wasn’t made up of a bunch of Commie lovin’ Kooks.”
Good point, Nasher.