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U.S. Secretary of Defense Mark Esper (1st L) welcomes Bahrain's Crown Prince Salman bin Hamad Al Khalifa (2nd L) at the Pentagon in Arlington, Virginia, the United States, on Sept. 17, 2019. (Photo by Ting Shen/Xinhua)
U.S. Secretary of Defense Mark Esper (1st L) welcomes Bahrain's Crown Prince Salman bin Hamad Al Khalifa (2nd L) at the Pentagon in Arlington, Virginia, the United States, on Sept. 17, 2019. (Photo by Ting Shen/Xinhua)