Tahirul Qadri, a religious leader in Pakistan, plans to lead a mass march to Islamabad on Sunday to protest against corruption, despite threats to his security.<br /><br />Restrictions are in place across the capital and paramilitary soldiers were called up.<br /><br />But who is this man and what does he want to achieve?<br /><br />Al Jazeera's Osama Bin Javaid reports from Lahore.
