Kesh, or uncut hair, is of special importance in the Sikh religion. It is one of the "five Ks"--traditional items that serve as symbols of faith and identity. As a thirty-five-year-old practicing Sikh, Jeet Bindra had never cut his hair or gone in public without a dastaar, or turban. But as rising star at the Chevron Corporation, when he was offered a major promotion that would require him, for safety reasons, to cut his hair and shave his beard,...