A forensic, insider account of the 2012 assault on the U.S. diplomatic compound in Benghazi that reconstructs the hours of the attack, identifies the militant groups and planners involved, and pinpoints security lapses and intelligence failures that left personnel vulnerable. Drawing on official documents, eyewitness testimony, and the author’s counterterrorism experience, the narrative challenges initial public explanations, traces how events unfolded on the ground, and criticizes the institutional and political responses that followed.