A packet of envelopes sildenafil citrate cenforce 100 mg tablets Muslim pilgrims leave after the Friday prayer at Mecca's Grand Mosque, on October 11, 2013 as hundreds of thousands of Muslims have poured into the holy city of Mecca for the annual hajj pilgrimage. The hajj is one of the five pillars of Islam and is mandatory once in a lifetime for all Muslims provided they are physically fit and financially capable.
