US Wary of Pakistan's Explanation of Bhutto Killing

“As far as I know, the Pakistanis are saying this is it, this is the proof,” said a senior State Department official, who, like other officials contacted for this article, spoke on condition of anonymity because of the continuing investigation. “Before our guys say yes or no, they need a hell of a lot more than one thing, even if it is a substantial piece of evidence.”