Any fan of rock or metal music knows that it wouldn’t exist without Led Zeppelin. Hell, even the President knows it. While it was likely written by a speechwriter, President Barack Obama honored the band at the Kennedy Center Honors this past weekend. We knew he was a fan of Beyonce, but Obama’s at least familiar enough with the band to sound like he knows what he’s talking about. He even brings up their predilection for trashing hotel rooms. Yesterday (3), the three surviving members of the band also went on The Late Show with David Letterman, where they discussed being honored by the President. While they didn’t perform on the show, you can check out their appearance after the jump.