Over 50,000 Americans died at Gettysburg, making it the bloodiest battle of the bloodiest war in our nation's history. And if you'd stepped on this sucker, you might have been the last casualty of the Civil War. From The Hill: According to the park, the shell was found within the Little Round Top rehabilitation project area in the southwest corner of Little Round Top, the site of a Union victory over the Confederacy on July 2, 1863, amid the Battle of Gettysburg. Officials with the park say the device dates to 1863. It weighs about 10 pounds, and measures about...