You would think that commemorating September 11 would be a snap for our allies, the French. After all, it was on September 11, 1814, that the Americans were victorious over the British at the critical Battle of Plattsburg. The battle was the turning point of the War of 1812 — fought by the U.S. partly in protest against Great Britain's nasty habit of kidnapping American sailors and pressing them into service in the Royal Navy, but also partly in defense of France, which was suffering under a British embargo. It was only the first time America went to war for...