I would be willing to bet money that FOX planted that flag in there. Notice we don't ever see who is holding it up. That person never shows their face. Probably because someone would recognize them from the FOX newsroom.

FOX's ratings have been slipping a lot lately and they've got to find ways to pump them up. Juicy scaremongering like this has always been their ace in the hole, but I think people are starting to lose interest in that sort of thing. About time, too.