Pakistan Top StoriesPTI lockdown call: Imran Khan arrives in KarachiTNT DeskDecember 12, 2014 by TNT DeskDecember 12, 2014 KARACHI: Pakistan Tehreek-e-Insaf (PTI) workers has been busy in sit-ins, as party chairman Imran Khan arrived in Karachi to join his workers in Karachi lockdown....