In this Thursday, Nov. 15, 2012 photo, visitors look at Pakistan-made unmanned 

In this Thursday, Nov. 15, 2012 photo, visitors look at Pakistan-made unmanned aircraft at defense exhibition in Karachi, Pakistan. Pakistan is secretly racing to develop its own armed drones, frustrated with U.S. refusals to provide the aircraft, but is struggling in its initial tests with a lack of precision munitions and advanced targeting technology. The development of unmanned combat aircraft is especially sensitive in Pakistan because of the widespread unpopularity of U.S. drone strikes against militants in the rugged tribal region bordering Afghanistan.(AP Photo/Shakil Adil)
Associated Press
In this Thursday, Nov. 15, 2012 photo, visitors look at Pakistan-made unmanned aircraft at defense exhibition in Karachi, Pakistan. Pakistan is secretly racing to develop its own armed drones, frustrated with U.S. refusals to provide the aircraft, but is struggling in its initial tests with a lack of precision munitions and advanced targeting technology. The development of unmanned combat aircraft is especially sensitive in Pakistan because of the widespread unpopularity of U.S. drone strikes against militants in the rugged tribal region bordering Afghanistan.(AP Photo/Shakil Adil)
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