good analysis here

Did the Bushies overplay the latest al-Qaida threat?: "If President Bush is truly serious about preventing terrorist attacks, he has to ensure that these alerts, even when they're wrong, are at least perceived as sincere and untainted by political motive. By this standard, Tom Ridge last Sunday proved himself a dreadful homeland security secretary, and the Bush administration (by association, if not collaboration) diminished the trust that a president must inspire on such matters."