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. 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