Anti-government protesters chase after policemen during the Revolution March towards the prime minister's house in Islamabad September 1, 2014 (Photo: Reuters)
Anti-government protesters clash with riot police during the Revolution March in Islamabad September 1, 2014 (Photo: Reuters)
Anti-government protesters clash with riot police during the Revolution March in Islamabad September 1, 2014 (Photo: Reuters)
Policemen try to avoid smoke from tear gas while dispersing anti-government protesters during the Revolution March towards the prime minister's house in Islamabad September 1, 2014 (Photo: Reuters)
A policeman runs to disperse anti-government protester during the Revolution March towards the prime minister's house in Islamabad September 1, 2014 (Photo: Reuters)
An anti-government protester holds a stick as he chants slogans before police officers during the Revolution March towards the prime minister's house in Islamabad September 1, 2014 (Photo: Reuters)
A bicyclist makes his way through tear gas fired by police to disperse protesters, carrying wood for cooking as the sun sets, in Islamabad, Pakistan, Monday, Sept. 1, 2014 (Photo: AP)
A Pakistani protester picks up a tear gas canister to throw back towards police during a clash in Islamabad, Pakistan, Monday, Sept. 1, 2014 (Photo: AP)
Police use tear gas to disperse protesters in Islamabad, Pakistan, Monday, Sept. 1, 2014 (Photo: AP)