The growing popularity of Sufism in Iran and its resurgence in Saudi Arabia.

"When Adnan moved to Saudi Arabia from his native Yemen four years ago, Sufi gatherings were often clandestine, sometimes held in orchards outside the city, or in basements and without microphones, for fear of drawing attention. "I couldn't wear this," he said, pointing to his turban. "Or this," he said, pulling at his white cotton overcoat. "Or I would be branded a Sufi. You couldn't even say the word 'Sufi.' It was something underground, dangerous, like talking about drugs."

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