Former U.S. President Barack Obama congratulates U.S. President Donald Trump after he took the oath of office on the West Front of the U.S. Capitol on Jan. 20, 2017 in Washington, DC. (Chip Somodevilla/Getty Images)
Russian President Vladimir Putin (R) meets with Britain's Prime Minister Theresa May on the sidelines of the G20 Leaders Summit in Hangzhou on September 4, 2016. / AFP / SPUTNIK / ALEXEI DRUZHININ (Photo credit should read ALEXEI DRUZHININ/AFP/Getty Images)
Chinese President Xi Jinping speaks at the opening session of the 19th Communist Party Congress in Beijing on Oct. 18, 2017. (Kevin Frayer/Getty Images)
French President Emmanuel Macron attends a ceremony at the Royal Military Academy Sandhurst, west of London on Jan. 18. (Ludovic Marin/AFP/Getty Images)
WASHINGTON, DC - JUNE 13: U.S. Defense Secretary James Mattis testifies before the Senate Armed Services Committee during a hearing in the Dirksen Senate Office Building on Capitol Hill June 13, 2017 in Washington, DC. Mattis and other Pentagon leaders testified about the proposed FY2018 National Defense Authorization Budget Request. (Photo by Chip Somodevilla/Getty Images)
An Afghan security personnel walks as he keep watch near the site of an attack by gunmen inside the Kart-e- Sakhi shrine in Kabul on October 11, 2016.
Gunmen targeted Shiite pilgrims in Kabul killing at least 14 people as they gathered to celebrate Ashura, one of the most important festivals on the Shiite calendar, officials said.The attack in the Afghan capital marked unravelling security as the resurgent Taliban continued to pressure Afghan forces, with hundreds of commandos sent to reinforce the provincial capital Lashkar Gah in the south.Some 36 people were wounded and at least one attacker killed in the Kabul attack, interior ministry spokesman Sediq Sediqqi said. / AFP / WAKIL KOHSAR (Photo credit should read WAKIL KOHSAR/AFP/Getty Images)
A convoy of US forces armoured vehicles drives near the village of Yalanli, on the western outskirts of the northern Syrian city of Manbij, on March 5, 2017. / AFP PHOTO / DELIL SOULEIMAN (Photo credit should read DELIL SOULEIMAN/AFP/Getty Images)
WASHINGTON, DC - APRIL 27: (AFP OUT) Senior advisor Jared Kushner looks on during a working luncheon with President Mauricio Macri of Argentina in the Cabinet Room of the White House April 27, 2017 in Washington, DC. Trump is scheduled to meet with Macri throughout the morning and early afternoon to discuss a range of bilateral issues. (Photo by Olivier Douliery-Pool/Getty Images)
Syrians, who were evacuated from the last rebel-held pockets of Syria's northen city of Aleppo, arrive on December 19, 2016 in the opposition-controlled Khan al-Assal region, west of the embattled city.
Gunmen attacked buses sent to evacuate people from two pro-regime villages in northwest Syria on December 18, 2016 but a senior military source said the incident should not disrupt parallel evacuations from Aleppo. Thousands of people were to leave the last rebel-held parts of the northern city of Aleppo in exchange for residents leaving Fuaa and Kafraya, Shiite villages, in the neighbouring province of Idlib. According to the Syrian Observatory for Human Rights, around 500 people left in a dawn convoy out of Fuaa and Kafraya on December 19, 2016. / AFP / Baraa Al-Halabi (Photo credit should read BARAA AL-HALABI/AFP/Getty Images)
TOPSHOT - Republican presidential candidate Donald Trump celebrates winning the South Carolina primary in Spartanburg, South Carolina, February 20, 2016.
Republican presidential frontrunner Donald Trump grabbed a big win in the South Carolina primary on February 20, 2016. The 69-year-old Trump captured about a third of the votes, according to early counts, but all major networks projected he was the winner. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
