[comatose]

Dan Rather, one of the last anchors doing his own reporting, got fired after reporting a bogus GWB story. A staffer was somewhat responsible for airing it, but that was the price of letting the staffer vet the story. I could probably think of some others that did make the news, but overall you're right. Typically The misinformation is front page and the retraction is weeks later, if at al, and as far from prominent as they can make it.