KABUL -- Afghan Defense Minister Mohammad Qasim Fahim on Wednesday denied reports of a mass grave of Taliban prisoners said to have suffocated in Northern Alliance trucks, but said an investigation had been launched. "I don't believe that there would be a mass grave in Dasht-e-Leili," Fahim said in the capital Kabul. "The Ministry of Defense has some contact with the concerned sources in the area and the province to do the exact investigation." The United States on Monday said it was looking into a *** Newsweek *** magazine report that some 1,000 Taleban prisoners may have died of asphyxiation...