Inside Mecca

With 1.3 billion believers, Islam is the world's fastest growing religion. Each year adherents from throughout the globe converge on Mecca for Hajj, the world's most dramatic display of religious fervor. As Muslims ask pardon for their sins and renew spiritual commitments, director Anisa Mehdi and National Geographic take cameras inside Mecca to capture the exclusive story of rites, rituals, vigils, and holy places closed to other faiths.