Pakistani Prime Minister Raja Pervaiz Ashraf (C) visits the five-day International Defense Exhibition at the expo center in southern Pakistani port city of Karachi, Nov. 7, 2012. A total of 135 foreign and 74 Pakistani firms participated in the international defense exhibition which kicked off here on Wednesday. (Xinhua)

Pakistani Prime Minister Raja Pervaiz Ashraf (2nd L, front) visits the five-day International Defense Exhibition at the expo center in southern Pakistani port city of Karachi, Nov. 7, 2012. A total of 135 foreign and 74 Pakistani firms participated in the international defense exhibition which kicked off here on Wednesday. (Xinhua)

A child checks a rifle on display during the five-day International Defense Exhibition at the expo center in southern Pakistani port city of Karachi, Nov. 7, 2012. A total of 135 foreign and 74 Pakistani firms participated in the international defense exhibition which kicked off here on Wednesday. (Xinhua)

Visitors check rifles on display during the five-day International Defense Exhibition at the expo center in southern Pakistani port city of Karachi, Nov. 7, 2012. A total of 135 foreign and 74 Pakistani firms participated in the international defense exhibition which kicked off here on Wednesday. (Xinhua)