Fred Kaplan: The problem with showing our Iraq evidence at the U.N. : “…U.S. intelligence officers, who are putting up fierce internal resistance to declassifying the Iraqi evidence, probably have good reasons for their dissent.

Their big concern is that the United States will blow a lot of highly sensitive intelligence data—the sort of sources and methods that are rarely even discussed, never deliberately revealed—and the cache still won’t be persuasive enough, especially not to the layman, to justify war.

Nobody on the outside knows exactly what sort of data dump Powell is assembling. But one can make some guesses and extrapolate reasons why the spy agencies might be nervous… Slate