That article is based on sources who were only able to see part of the story due to the compartmentalized way information is distributed among special operations types. The true story is that "Ambassador Stevens," was involved in planning the 311/2011 nuclear and tsunami
terror attack against Japan. He was in Libya directing a shift of Al CIAda resources to topple the Siryian government. He was deliberately placed in danger like a worm on a hook to see who he would contact for help. This was meant to uncover the network behind the 311 attack
and a planned (and prevented) nulcear attack against the London Olympics. The result of the Stevens operation was the dismissal of 26 senior US military and intelligence personel, including Petraeus, linked to the Nazi Odessa network headed by George Bush Sr. They were
planning to start WW3 by attacking themselves in the Persian Gulf and blaming it on Iran. That has been prevented as well.
The sources from what I wrote above include MI6, CIA and Japanese Military Intelligence.