The story of the Sept. 11 terrorist attack in Benghazi has been evolving for more than seven weeks now, in its many and oft conflicting variants, and the questions keep multiplying. Amid the official obfuscations and evasions, a patchwork picture has been emerging, by way of congressional questions, leaked emails, anonymous sources and documents discovered as recently as this week by reporters wandering through the still-unsecured, burned and looted diplomatic compound where Ambassador Chris Stevens apparently spent his final moments of consciousness choking on the smoke of a diesel-fueled conflagration.