Three times Ambassador Chris Stevens begged for more military protection and three times, then Secretary of State, Hillary Clinton, denied Stevens cries for help. Clinton did not respond to requests for help by saying no, she responded by not responding to the pleas through official channels.
Stevens had long been a CIA asset who had run guns to al-Qaeda for the purposes of gaining assistance for the CIA inspired led regime changes in Libya and then in Syria. This is nothing new and has been widely reported.
It is not a secret that the CIA's propensity to use rogue forces to accomplish a foreign policy objective (i.e., regime change) is not new. The fact that the CIA engages in drug trafficking to fund such an operation is also not new as the American public was introduced to the existence of Air America, Iran-Contra and the nefarious actions of Lt. Colonel Oliver North in televised congressional hearings during the Reagan administration.