When in Rome … another tourist has defaced the Colosseum. A Swiss girl carved her initials into the iconic amphitheater — less than a month after another tourist stunningly defaced the ancient landmark with his and his fiancée’s names Police have launched an investigation after Italian tour guide David Battaglino captured video of the unidentified 17-year-old girl carving the letter “N” into the wall, La Repubblica reported. The footage posted on Twitter by Italian news agency ANSA shows the blond girl, whose face is blurred, using an object to carve the letter before she backs off amid the attention. “It...