An Iranian clergyman walks by an oversize copy of the Koran during the 15th annual International Koran Exhibition at the Imam Khomeini Grand Mosque during the first day of holy month of Ramadan in Tehran, Iran on September 13, 2007. During the month of Ramadan, the ninth month of the Islamic calendar, Muslims abstain from eating, drinking and smoking from sunrise to sunset. (UPI Photo/Mohammad Kheirkhah)