Why not a peep from those present that survived?
Who denied the "extra" security requested and why?
Was "UBL is dead, GM is alive and Al Qaeda is on the run" worth playing ostrich and allowing the 4 deaths?
Just like with fast & fuzzy, nodoby did anything wrong, nobody at "the top" was aware of what was going on; shuffle some papers, move some peons around and boldly announce that "mistakes were made", changes will result and life goes on. Rinse and repeat...