WASHINGTON – Yemeni sources told United Press International Wednesday that the presence of uniformed U.S. military personnel in the country would embarrass President Ali Abdullah Saleh, but covert U.S. operatives would be welcome as long as they are discreet. "Marines in the country might weaken enthusiasm for President Saleh's cooperation in the war on terror," one well-placed Yemeni source told UPI Wednesday in response to reports this week that U.S. officials had asked Sanaa to host Marines in the next front in the war on terror. Meanwhile, the State Department on Wednesday knocked down reports that the United States had ...