U.S. Concedes Uncertainty on North Korean Uranium Effort - New York Times

I don't understand. Perhaps my reading comprehension is not very good. Is the NYT saying that our intelligence regarding North Korea failed because we weren't sure what kind of nuclear bomb they were making?

So, somehow, we are idiots because we thought they were making a bomb out of uranium instead of what they actually made their bomb out of: plutonium!

Huh.