The MC has finally run out of WWII, Korea and Vietnam reruns. Top Ten reruns are getting frayed. And... the stuff they've been getting from iraq and afghanistan doesn't play to well. And they can only show so many Chuck Norris movies, etc.
Many people and families have been affected by the so called War on Terror as well as the forays into iraq, afghanistan, etc. They're tire of hearing about it. They don't want to watch it. It may be as simple as that.