This is neat and clearly an important discovery and all, but I'd be lying if I said I wasn't a little bit disappointed.
Cheer up, the broadcast is still going. They're just using the phosphorus-free DNA as a red herring to make the final part more shocking. You know, the last minute where they reveal Bush tied to a chair, take a good grip on his nose, and pull off the human mask to reveal a reptilian overlord beneath.
and he would have gotten away with it if it weren't for you meddling kids!