NEW YORK  - The United States is withdrawing more staff from its embassy in Tripoli, some two weeks after cutting personnel to emergency levels following an attack on its consulate. “This is a further drawdown of staff for security reasons,” a State Department official said, amid reports that more demos are planned in Tripoli and Benghazi on Friday. “We will review our posture again early next week, with the goal of restoring staff as soon as conditions allow,” the official said. Most American diplomatic staff had already been withdrawn from the embassy in Tripoli, after a 9/11 attack on the US mission in Benghazi killed four, including the ambassador.