Ambassador Stevens and the diplomatic mission in Libya made multiple security related requests that were turned down by Washington based officials.
The small DC-3 plane as an asset for a security team to more freely and safely move throughout the country, and to more easily transport arms and other security equipment. In short, having the plane allowed the security team to better perform its duties
The question is whether the State Department was as aware as they should have been about the deteriorating security situation in Libya, and whether officials were doing everything they could to protect Americans in that country.
Also problematic are the thirteen incidents leading up to the attack, ranging from IED and RPG attacks to a “posting on a pro-Gaddafi Facebook page” publicizing early morning runs taken by the late Ambassador Stevens and his security detail around Tripoli.