Islamabad on the edge as Imran Khan leads massive protest rally

Pakistan's cricketer-turned-politician Imran Khan waves to supporters as he leads a march toward parliament in Islamabad, Pakistan on Wednesday.
Tens of thousands of protesters armed with wire cutters and backed by cranes broke through barriers protecting Pakistan's parliament and other government buildings Tuesday night, demanding the country's Prime Minister Nawaz Sharif resign. (Source: AP)

Supporters of Pakistani religious cleric Tahir-ul-Qadri dance during a march in front of the parliament building in Islamabad. (Source: AP)

Pakistan's cricketer-turned-politician Imran Khan motivates his supporters to march to Parliament House in Islamabad. (Source: AP)

Pakistan's cricketer-turned-politician Imran Khan delivers a speech to his supporters urging them to march to Parliament in Islamabad. (Source: AP)

A supporter of Pakistani cricketer-turned-politician Imran Khan, gestures during a protest in Islamabad. (Source: AP)

Supporters of Pakistan's cricketer-turned-politician Imran Khan dance before marching to Parliament, which authorities blocked access to with shipping containers in Islamabad. (Source: AP)

A supporter of Pakistan's cricketer-turned-politician Imran Khan chants anti-government slogans in Islamabad. (Source: AP)

Thousands of supporters of anti-government cleric Tahir-ul-Qadri dance during a march in front of parliament building in Islamabad. (Source: AP)

Supporters of Pakistan's cricketer-turned-politician Imran Khan listen their leaders' speech prior to march toward parliament in Islamabad. (Source: AP)

Pakistani religious cleric Tahir-ul-Qadri flashes "V" sign to his supporters during a massive rally in front of the parliament building in Islamabad. (Source: AP)

Supporters of Pakistani religious cleric Tahir-ul-Qadri rest in front of the parliament building during a massive rally in Islamabad. (Source: AP)

Supporters of Pakistani religious cleric Tahir-ul-Qadri, rest in front of the parliament building, after tens of thousands of protesters entered Islamabad's high-security Red Zone the night before, five days after arriving in the capital from the eastern city of Lahore in convoys, in Islamabad.
Jubilant anti-government demonstrators in Pakistan are claiming victory after tearing down barricades and occupying a key road outside parliament, where they are demanding the resignation of Prime Minister Nawaz Sharif. (Source: AP)

Supporters of Pakistan's cricket-turned-politician Imran Khan wait to march to the Parliament in Islamabad. (Source: AP)