U.S. President Donald Trump leaves after announcing his decision to exit the Iran nuclear deal in a speech at the White House on May 8. (Saul Loeb/AFP/Getty Images)
China's President Xi Jinping greets UN Secretary General Antonio Guterres at Belt and Road Forum, in Yanqi Lake, north of Beijing, on May 15, 2017. (Roman Pilipey/AFP/Getty Images).
U.N. General Assembly votes overwhelming to reject President Donald Trump's decision to recognize Jerusalem as Israel's capital on December 21, 2017 in New York City. (Photo by Spencer Platt/Getty Images)
Ken Isaacs, the U.S. candidate to head the International Organization for Migration, at a press briefing in Geneva on March 19. (Fabrice Coffrini/AFP/Getty Images)
Portraits of the Russian and Syrian presidents are displayed at the government-held Wafideen checkpoint on the outskirts of Damascus on April 3. (Louai Beshara/AFP/Getty Images)
Lt. Gen. Kenneth McKenzie Jr, the director of the Joint Chiefs of Staff, briefs the press on the strikes against Syria at the Pentagon in Washington, D.C., on April 14. 2018.
SAUL LOEB/AFP/Getty Images
China's U.N. ambassador, Liu Jieyi, votes to bar discussion of North Korea's human rights record at the U.N. Security Council in New York on Dec. 22, 2014. (Kena Betancur/Getty Images)
Nikki Haley, the U.S. ambassador to the U.N., tours a U.S.-funded supermarket in the Zaatari refugee camp in Jordan on May 21, 2017. (Raad Adayleh/AFP/Getty Images)
President Donald Trump and Secretary of State Rex Tillerson wait for a meeting with South Korean President Moon Jae-in in Washington on June 30, 2017. (Brendan Smialowski/AFP/Getty Images)
Nikki Haley, the U.S. ambassador to the United Nations, and Jared Kushner, a White House Senior Advisor, attend a U.N. Security Council meeting on February 20, 2018 in New York City. (Photo by Drew Angerer/Getty Images)
Nikki Haley, the U.S. ambassador to the United Nations, answers questions from reporters at a White House press briefing on April 24, 2017. (Photo by Cheriss May/NurPhoto via Getty Images)