Another tourist was caught on video defacing the Colosseum in Rome, this time a teenage girl from Switzerland, authorities said. » Sign up for our newsletter KnowThis to get the biggest stories of the day delivered straight to your inbox: go.nowth.is/knowthis_youtube » Subscribe to NowThis: go.nowth.is/News_Subscribe For more world news and viral videos, subscribe to @NowThisNews. A video and photos shared by Italian tour guide David Battaglino show the young tourist at the Colosseum on Friday, apparently carving her initial into a wall of the nearly 2,000-year-old amphitheater. Battaglino reported the defacement to site security, who then reported it to Italian authorities. The incident is part of an alarming trend. Per reports, a different teenage visitor was allegedly caught defacing the Colosseum the next day. And last month, 27-year-old Ivan Dimitrov was visiting from the UK when he was filmed carving his name and the name of his fiancée into the monument. Each...