Justice Mian Saqib Nisar today took oath of office as Pakistan's 25th Chief Justice. 62-year Nisar replaced Justice Anwar Zaheer Jamali who retired yesterday.<br/><br/>The oath-taking ceremony was attended by Prime Minister Nawaz Sharif, Chairman of the Senate and Speaker of the National Assembly, among others.<br/><br/>Justice Nisar is the senior-most judge of the Supreme Court and has also served as a judge in the Lahore High Court.