Police on Sunday were preoccupied with a three-day intensive search for missing American tourist Herman Kahn, 80, who disappeared on Friday in Bet She'an.Dozens of police from the Bet She'an police station, backed by a helicopter, officers on horseback, Border Police, and 30 IDF soldiers scoured the area of Bet She'an over the weekend and Shavuot holiday, searching for Kahn.On Friday at noon, Kahn arrived with a group of tourists to an ancient ruins site in the area. Since then, he has vanished without a trace.Police at first suspected that he may have gotten on the wrong tourist bus.