PakistanShireen Mazari resigns from PTIWaqar AhmedSeptember 26, 2012September 27, 2012 by Waqar AhmedSeptember 26, 2012September 27, 2012 Islamabad: In what appeared to be a big-blow to the Imran Khan’s Pakistan Tehreek-e-Insaf (PTI), its senior leader and one of the old guards Shireen...