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The difference between "attacked us" and "didn't attack us" seems so basic,
NO THEY DID NOT. As Tim3 points out we were not attacked by the Afghan government which as been the left's dividing line here for years. Even if you argue they hid OBL that doesn't pass muster as a "cassus belli".
As usual the left finds itself pursuing actions for which they loudly denounce others. Tsk. Tsk.