President Trump, in first trip overseas as president, says the fight against extremism is 'a battle between good and evil.'
Trump Visits Saudi Arabia

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President Donald Trump delivers a speech to the Arab Islamic American Summit, at the King Abdulaziz Conference Center, May 21, 2017, in Riyadh.

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(Front R-L) Jordan's King Abdullah II, Saudi Arabia's King Salman bin Abdulaziz Al-Saud, President Trump, and Abu Dhabi Crown Prince Sheikh Mohammed bin Zayed al-Nahyan pose for a photo during Arab-Islamic-American Summit in Riyadh, May 21, 2017.

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President Donald Trump meets with Gulf Cooperation Council leaders during their summit in Riyadh, May 21, 2017.

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Emir of Kuwait Sabah Al-Ahmad Al-Jaber Al-Sabah meets with U.S. President Donald Trump in Riyadh, Saudi Arabia, May 21, 2017.