The shores of the Bosphorus Strait were once lined with fortifications built by Byzantine emperors and Ottoman sultans protecting Constantinople. Today, one of the world's longest suspension bridges spans the Bosphorus, linking European Turkey with Asian Turkey. The bridge was completed on October 30, 1973—one day after the Turkish republic's 50th anniversary. A second bridge was finished in 1988. Which American comedian led children across the first bridge during its opening ceremony?