ROME (AP) — For the first time in nearly 2,000 years, visitors to Rome’s world-renowned Colosseum will have the opportunity to walk through a hidden imperial passage that once allowed Roman emperors to reach the ancient amphitheater unseen. The once-secret corridor — known as the “Commodus Passage” and named after the Roman emperor turned into a pop icon by Ridley Scott’s movie “Gladiator” — opens to the public on Oct. 27, marking an extraordinary milestone in archaeological preservation and