FILE - In this Dec. 14, 2017 file photo, the remains of an Iranian Qasef-1 Unmanned Aerial Vehicle, used as a one-way attack to dive on targets and then detonating its warhead, which was fired by Yemen into Saudi Arabia, according to then-U.S. Ambassador to the U.N. Nikki Haley, is seen during a press briefing at Joint Base Anacostia-Bolling in Washington. Saudi Arabia said drones attacked one of its oil pipelines as other assaults targeted energy infrastructure elsewhere in the kingdom on Tuesday, May, 14, 2019, shortly after Yemen's rebels claimed a coordinated drone attack on the Sunni power. (AP Photo/Cliff Owen, File)
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