Error loading player: No playable sources found

02:08

Inside one of Southeast Asia's largest mosques, Nasaruddin Umar is conducting his usual Friday prayers. It's a routine he has been doing for the past three years. He is the Imam in Istiqlal Mosque, one of Indonesia's oldest places of worship. Many Muslims in Indonesia take the sermons in their mosques very seriously, which means leaders of the mosques should continue to set good examples to the Indonesian public.