This is how the U.S. government and American media jointly disseminate propaganda: in the immediate wake of some newsworthy War on Terror event, U.S. Government officials (usually anonymous) make wild and reckless — though unverifiable — claims. The U.S. media mindlessly trumpets them around the world without question or challenge. Those claims become consecrated as widely accepted fact. And then weeks, months or years later, those claims get quietly exposed as being utter falsehoods, by which point it does not matter, because the goal is already well-achieved: the falsehoods are ingrained as accepted truth.
via How propaganda is disseminated: WikiLeaks Edition – Glenn Greenwald – Salon.com.