A World War II-era Sherman tank drove down Third Street in Harrisburg, Pa., to Midtown Scholar on Tuesday as part of a book signing by Adam Makos, author of Spearhead: An American Tank Gunner, His Enemy, and a Collision of Lives in World War II (Ballantine Books). The book focuses on Pennsylvania war hero and tank gunner Clarence Smoyer, who at age 19 fought in the 3rd Armored Division during the Battle of Cologne. Mayor Eric Papenfuse, who owns Midtown Scholar, presented Smoyer, now 95, with a key to the city in front of the tank.