The remnants of an unsolved 1920 Wall Street bomb blast can still be seen on a bank’s facade

The forecast mentioned rain. But the brokers, clerks, messengers, and stenographers who left their Wall Street headquarters for lunch just before noon on September 16, 1920, were greeted by sunny skies. While the bells of Trinity Church a block away rang to mark the hour and workers headed to lunch trucks and restaurants, a bomb went off. Nobody knew in that instance that it was a bomb, of course. It would take a few days for investigators to determine that a man concealed 100 pounds of dynamite loaded with iron weights in a horse-drawn wagon, parked the wagon in front of the U.S. Assay Office at 30 Wall Street, then disappeared into the crowd. A deafening roar knocked people off their feet, while those closer to the blast were burned by fire or mutilated by shrapnel. Thirty people died at the scene, with the number eventually rising to 38, and hundreds more were injured. This week marks the 106th anniversary of what’s mainly known as the Wall Street Bombing. The case is officially…