ASSOCIATED PRESS BAGHDAD, Iraq -- Al-Qaida in Iraq's leader, in a chilling audiotape released Thursday, called for nuclear scientists to join his group's holy war and urged insurgents to kidnap Westerners so they could be traded for a blind Egyptian sheik who is serving a life sentence in a U.S. prison. The fugitive chief of the terrorist group said experts in the fields of "chemistry, physics, electronics, media and all other sciences -- especially nuclear scientists and explosives experts" -- should join his group's jihad, or holy war, against the West. "We are in dire need of you," said the...