Supporters of Muhammad Tahirul Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), hold pictures of him as they wait for other supporters marching towards Islamabad August 15, 2014. Clashes broke out Friday as tens of thousands of Pakistani protesters from two anti-government movements converged on the capital, presenting the 15-month-old civilian government with its biggest challenge yet.[Photo/Agencies]