ROME, ITALY AUGUST 4: Tourists in front of the Arch of Constantine, the central archaeological area which includes the Coliseum is one of the most beloved places by Italian and foreign tourists 4, 2016 in Rome, Italy. Strengthened security measures around the Colosseum with gates controlled by contingents of the police. This new anti-terrorism device is ordered by Rome police headquarters. The anti-terrorist action was taken "in view of the summer, which has changed the way of life of the city of Rome" and after threats of Daesh: "We shall strike Israel and conquer Rome." (Photo by Stefano Montesi/Corbis via Getty Images)"n
