A fascinating (and fascinatingly dated) 1925 silent documentary by Merian Cooper and Ernest Schoedsack, the codirectors of King Kong, about a U.S. travel expedition through the mountains of Turkey and Persiamore specifically, about the annual migration of more than 50,000 Bakhtiari tribesmen with their cattle in search of fresh pastures. Topographically beautiful and historically potent. 64 min. (JR)