NEW YORK (AFP) - Democratic presidential candidate John Kerry challenged President George W. Bush) to prosecute former national security aide Richard Clarke if they can show that he lied about terrorism policy. "My challenge to the Bush administration would be, if (Clarke) is not believable and they have reason to show it, then prosecute him for perjury because he is under oath, Kerry told CBS's MarketWatch. "They have a perfect right to do that," said Kerry. Republicans in Congress want to declassify testimony Clarke gave before Congress in 2002 that they claim is at odds with accounts critical of the...