On Aug. 24, 1814, for the first and only time in our country's history, Washington, D.C. was overrun by an invading army. The British army had easily defeated inexperienced American defenders, and set the city ablaze. The President fled to Brookeville, MD, and many of the citizens had fled along with the army. Those few residents of the capital who hadn't already fled may well have prayed for anything that could stop the flames. What they got, however, was something far more than they were hoping for: a "tornado" more powerful than any storm in living memory.