Nathan J. Robinson in Current Affairs:
What happens in the leadup to war is that government officials make claims about the enemy, and then those claims appear in newspapers (“U.S. officials say Saddam poses an imminent threat”) and then in the public consciousness, the “U.S. officials say” part disappears, so that the claim is taken for reality without ever really being scrutinized. This happens because newspapers are incredibly irresponsible and believe that so long as you attach “Experts say” or “President says” to a claim, you are off the hook when people end up believing it, because all you did was relay the fact that a person said a thing, you didn’t say it was true. This is the approach the New York Times took to Bush administration allegations in the leadup to the Iraq War, and it meant that false claims could become headline news just because a high-ranking U.S. official said them. [UPDATE: here’s an example from Vox, today, of a questionable government claim being magically transformed into a certain fact.]
More here.