The Czechs didn't flip-flop. But that didn't stop the NYTimes from claiming that they did.
Reporting from "reliable sources inside the intelligence community", the Times said that Vaclav Havel had called President Bush and assured him that the Czech intelligence services had "no credible evidence" that al-Ani had ever met with Atta in Prague, as was claimed.
Two days later, they Times was forced to print a retraction. The Czech Ambassador instructed them that Havel had done no such thing.