Just after noon on September 16, 1920, as hundreds of workers poured onto Wall Street for their lunchtime break, a horse-drawn cart packed with dynamite exploded in a spray of metal and fire, turning the busiest corner of the financial center into a war zone. Thirty-nine people died and hundreds more lay wounded, making the Wall Street explosion the worst terrorist attack in U.S. history until the Oklahoma City bombing. In The Day Wall Street...