Muhammad Tahirul Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT) speaks to supporters before they begin their march to the capital from Lahore August 14, 2014. Thousands of anti-government protesters began to march on the Pakistani capital, Islamabad, on Thursday from the eastern city of Lahore, raising fears about political stability and prospects for civilian rule in the nuclear-armed country. Two protest groups - one led by cricketer-turned-opposition politician Imran Khan, and the other by activist cleric Tahir ul-Qadri - are heading to the capital to demand that a government they condemn as corrupt steps down. REUTERS/Mohsin Raza (PAKISTAN - Tags: POLITICS CIVIL UNREST)