Pakistan's Prime Minister Nawaz Sharif (C) inspects the indigenously manufactured surveillance drone at the Pakistan Aeronautical Complex in Kamra, some 65 km west of Islamabad on December 18, 2013, as Pakistani air chief Tahir Rafique Butt (R) and army chief Raheel Sharif (L) look on. Pakistan on December 18 launched  production of a new version of a combat aircraft featuring upgraded avionics and weapons system. The plane, to be called Block-II JF-17, will be manufactured at the Pakistan Aeronautical Complex west of Islamabad, which has so far produced 50 older-model Block-I JF-17s for the air force. AFP PHOTO/Aamir QURESHI        (Photo credit should read AAMIR QURESHI/AFP/Getty Images)