A supporter of Imran Khan wears a badge with a photo of him while attending the Freedom March in Islamabad
A supporter of Imran Khan, cricketer-turned-opposition-politician and chairman of the Pakistan Tehreek-e-Insaf (PTI) political party, wears a badge with a photo of him while attending the Freedom March in Islamabad August 16, 2014. More than 20,000 anti-government protesters flooded the centre of Pakistan's capital on Saturday, vowing to stay in the streets until Prime Minister Nawaz Sharif resigns. REUTERS/Faisal Mahmood (PAKISTAN - Tags: POLITICS CIVIL UNREST)
Supporters of Imran Khan wave flags attend the Freedom March in Islamabad
Supporters of Imran Khan, cricketer-turned-opposition politician and chairman of the Pakistan Tehreek-e-Insaf (PTI) political party, wave flags upon their arrival to attend the Freedom March in Islamabad August 16, 2014. More than 20,000 anti-government protesters flooded the centre of Pakistan's capital on Saturday, vowing to stay in the streets until Prime Minister Nawaz Sharif resigns. REUTERS/Faisal Mahmood (PAKISTAN - Tags: POLITICS CIVIL UNREST)
A supporter of Khan listens to his speech during the Freedom March in Islamabad
A supporter of Imran Khan, cricketer-turned-opposition politician and chairman of the Pakistan Tehreek-e-Insaf (PTI) political party, sits on a barricade as he listens to his speech during the Freedom March in Islamabad August 16, 2014. More than 20,000 anti-government protesters flooded the centre of Pakistan's capital on Saturday, vowing to stay in the streets until Prime Minister Nawaz Sharif resigns. REUTERS/Faisal Mahmood (PAKISTAN - Tags: POLITICS CIVIL UNREST)
A supporter of Pakistan Tehreek-e-Insaf, a political party led by cricketer-turned-opposition politician Imran Khan, takes a nap under an umbrella near a party flag upon his arrival with others to participate in the Freedom March in Islamabad
A supporter of Pakistan Tehreek-e-Insaf, a political party led by cricketer-turned-opposition politician Imran Khan, takes a nap under an umbrella near a party flag upon his arrival with others to participate in the Freedom March in Islamabad August 16, 2014. More than 20,000 anti-government protesters flooded the centre of Pakistan's capital on Saturday, vowing to stay in the streets until Prime Minister Nawaz Sharif resigns. REUTERS/Akhtar Soomro (PAKISTAN - Tags: POLITICS CIVIL UNREST)
A supporter of Pakistan Tehreek-e-Insaf, a political party led by cricketer-turned-opposition politician Imran Khan, sits with a stick behind the barricade of barbwires upon his arrival with others to participate in the Freedom March in Islamabad
A supporter of Pakistan Tehreek-e-Insaf, a political party led by cricketer-turned-opposition politician Imran Khan, sits with a stick behind the barricade of barbwires upon his arrival with others to participate in the Freedom March in Islamabad August 16, 2014. More than 20,000 anti-government protesters flooded the centre of Pakistan's capital on Saturday, vowing to stay in the streets until Prime Minister Nawaz Sharif resigns. REUTERS/Akhtar Soomro (PAKISTAN - Tags: POLITICS CIVIL UNREST)
Supporters of Pakistan Tehreek-e-Insaf, a political party led by cricketer-turned-opposition politician Imran Khan, wave flags from the roof of a van as they arrive with the Freedom March in Islamabad
Supporters of Pakistan Tehreek-e-Insaf, a political party led by cricketer-turned-opposition politician Imran Khan, wave flags from the roof of a van as they arrive with the Freedom March in Islamabad August 16, 2014. More than 20,000 anti-government protesters flooded the centre of Pakistan's capital on Saturday, vowing to stay in the streets until Prime Minister Nawaz Sharif resigns. REUTERS/Akhtar Soomro (PAKISTAN - Tags: POLITICS CIVIL UNREST)
Pakistan protesters vow no let-up until PM Sharif steps down
PAKISTAN-POLITICS/ (PIX, TV,UPDATE 1):UPDATE 1-Pakistan protesters vow no let-up until PM Sharif steps down
Supporters of Muhammad Tahir ul-Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), listen to Qadri speak during the Revolution March in Islamabad
Supporters of Muhammad Tahir ul-Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), listen to Qadri (bottom R) speak during the Revolution March in Islamabad August 16, 2014. The leaders of two Pakistani protest movements vowed on Saturday to keep their protests alive until Prime Minister Nawaz Sharif resigns, after thousands entered the country's capital in the biggest challenge yet to the 15-month-old civilian government. REUTERS/Akhtar Soomro (PAKISTAN - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)
A supporter of Muhammad Tahirul Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), waves a national flag in front of a stage during the Revolution March in Islamabad
A supporter of Muhammad Tahirul Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), waves a national flag in front of a stage during the Revolution March in Islamabad August 16, 2014. The leaders of two Pakistani protest movements vowed on Saturday to keep their protests alive until Prime Minister Nawaz Sharif resigns, after thousands entered the country's capital in the biggest challenge yet to the 15-month-old civilian government. REUTERS/Akhtar Soomro (PAKISTAN - Tags: POLITICS CIVIL UNREST)
A national flag is seen amidst the supporters of Muhammad Tahirul Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), as they gather to listen to his speech during the Revolution March in Islamabad
A national flag is seen amidst the supporters of Muhammad Tahirul Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), as they gather to listen to his speech during the Revolution March in Islamabad August 16, 2014. The leaders of two Pakistani protest movements vowed on Saturday to keep their protests alive until Prime Minister Nawaz Sharif resigns, after thousands entered the country's capital in the biggest challenge yet to the 15-month-old civilian government. REUTERS/Akhtar Soomro (PAKISTAN - Tags: POLITICS CIVIL UNREST)