A Navy X-47B drone is launched off the nuclear powered aircraft carrier USS George H. W. Bush off the coast of Virginia, Tuesday, May 14, 2013. The plane isn't intended for operational use, but it will be used to help develop other unmanned, carrier-based aircraft. (AP Photo/Steve Helber)

Associated Press
A Navy X-47B drone is launched off the nuclear powered aircraft carrier USS George H. W. Bush off the coast of Virginia, Tuesday, May 14, 2013. The plane isn't intended for operational use, but it will be used to help develop other unmanned, carrier-based aircraft. (AP Photo/Steve Helber)
A Navy X-47B drone is launched off the nuclear powered aircraft carrier USS George H. W. Bush off the coast of Virginia, Tuesday, May 14, 2013. The plane isn't intended for operational use, but it will be used to help develop other unmanned, carrier-based aircraft. (AP Photo/Steve Helber)
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