What is it about a 2,000-year-old famous structure that makes tourists think it isn’t yet complete without their initials joining the blood, sweat and tears of gladiators past on the walls? After a Russian tourist was fined $25,000 for carving his initial in the wall of Rome’s Colosseum last fall, two American visitors have been accused of leaving their initials behind — and of course, taking a selfie to capture the moment of vandalism. [More]