Journalists walk past billboards during a media preview ahead of the 9th International Defense Exhibition and Seminar (IDEAS) in Pakistan's southern port city of Karachi, on Nov. 21, 2016. The four-day event will kick off on Tuesday. (Xinhua/Masroor)
Staff members are seen in front of a Pakistani Al-Zarrar tank (Rear) during a media preview ahead of the 9th International Defense Exhibition and Seminar (IDEAS) in Pakistan's southern port city of Karachi, on Nov. 21, 2016. The four-day event will kick off on Tuesday. (Xinhua/Masroor)
