IT SEEMS THAT Monday’s groundbreaking New York Times story on missing explosives in Iraq was certainly not groundbreaking and may not even be true. The allegations that nearly 400 tons of “high explosives” were missing from the al Qaqaa arms dump are based on charges leveled by Mohamed al Baradei, chairman of the International Atomic Energy Agency. The claims are old and increasingly suspect. But that hasn’t kept John Kerry’s presidential campaign from using the story in a new television ad and in virtually every stump speech and media appearance over the past two days.

Now, however, the Kerry campaign admits that the information that is the basis of Senator Kerry’s statements and his campaign advertisement may not even be true. Pressed on Tuesday afternoon about the accuracy of the allegations on Fox’s Big Story with John Gibson, Richard Holbrooke, a senior adviser to the Kerry campaign, said: “You don’t know the truth and I don’t know the truth.” He later underscored this point: “I don’t know the truth.”