The attack has raised questions about the adequacy of security preparations at the two American compounds in Benghazi: the American mission, the main diplomatic facility where Mr. Stevens and another American diplomat died of smoke inhalation after an initial attack, and an annex a half-mile away that encompassed four buildings inside a low-walled compound.
From among these buildings, the C.I.A. personnel carried out their secret missions. The New York Times agreed to withhold locations and details of these operations at the request of Obama administration officials, who said that disclosing such information could jeopardize future sensitive government activities and put at risk American personnel working in dangerous settings.