War On Terror: A sketchy diagram of al-Qaida's defenses left behind by Abu Musab al-Zarqawi may prove to be the key to victory in Iraq. Sometimes in the fog of war, the fog lifts.It may not rank in the annals of warfare with the breaking of the Imperial Japanese Code, which led to our naval victory at Midway in World War II, or the cracking of the Nazi Ultra Codes, which Dwight Eisenhower said was decisive in the Allied victory. But a map left behind in a safe house by the deceased leader of al-Qaida in Iraq may have helped...