Iran says it has successfully tested its version of a U.S. drone.

Iranian officials said Monday the design of the drone is based on the RQ-170 Sentinel, a U.S. drone seized in 2011 when it traveled into Iranian airspace.

Iran says it has captured several U.S. drones and is currently copying the Boeing-designed ScanEagle.

Iran has accused the U.S. of using drones to spy on the Iranian nuclear program. 
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