SHANDONG, CHINA - DECEMBER 22: (CHINA MAINLAND OUT)Chinese first peacekeeping infantry battalion will go to South Sudan for peacekeeping mission on 22th December, 2014 in Laiyang, Shandong, China.(Photo by TPG/Getty Images)
DES MOINES, IA - SEPTEMBER 29: Democratic presidential nominee former Secretary of State Hillary Clinton speaks during a campaign rally on September 29, 2016 in Des Moines, Iowa. Hillary Clinton is campaigning in Iowa. (Photo by Justin Sullivan/Getty Images)
Russian President Vladimir Putin (R) listens to explanations during his visit to Nadezhda sailing vessel in Sochi on September 24, 2016. / AFP / SPUTNIK / ALEKSEY NIKOLSKY (Photo credit should read ALEKSEY NIKOLSKY/AFP/Getty Images)
TAJI, IRAQ - APRIL 12: A U.S. Army trainer (L), instructs Iraqi Army recruits at a military base on April 12, 2015 in Taji, Iraq. Members of the U.S. Army's 5-73 CAV, 3BCT, 82nd Airborne Division are teaching members of the newly-formed 15th Division of the Iraqi Army, as the Iraqi government launches offensives to try to recover territory lost to ISIS last year. U.S. forces, currently operating in 5 large bases throught the country, are training thousands of Iraqi Army combat troops, trying to rebuild a force they had origninally trained before the U.S. withdrawal from Iraq in 2010. (Photo by John Moore/Getty Images)
DENVER, CO - APRIL 01: Senator John McCain gives a thumbs up to the crowd at the end of the presentation. The Counterterrorism Education Learning Lab (CELL) hosted U.S. Senators John McCain and Lindsey Graham for its event entitled, Violent Extremism & U.S. Response April 1, 2015 moderated by Ed Henry, Chief Whitehouse Correspondent for Fox News at the Ellie Caulkins Opera House. Both Senators currently serve on the Senate Armed Services Committee, with McCain serving as Chairman. (Photo By John Leyba/The Denver Post via Getty Images)
Members of a joint investigation team present the preliminary results of the criminal investigation into the downing of Malaysia Airlines flight MH17 , in Nieuwegein, on September 28, 2016.
Last year a separate inquiry led by the Dutch Safety Board (OVV) found the Boeing 777 was hit by a BUK missile fired from an area most likely in rebel-held eastern Ukraine, where pro-Russian separatists have been battling Ukrainian forces since early 2014. / AFP / EMMANUEL DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
HEMPSTEAD, NY - SEPTEMBER 26: Republican presidential nominee Donald Trump gestures during the Presidential Debate at Hofstra University on September 26, 2016 in Hempstead, New York. The first of four debates for the 2016 Election, three Presidential and one Vice Presidential, is moderated by NBC's Lester Holt. (Photo by Win McNamee/Getty Images)
during the Presidential Debate at Hofstra University on September 26, 2016 in Hempstead, New York. The first of four debates for the 2016 Election, three Presidential and one Vice Presidential, is moderated by NBC's Lester Holt.
ALEPPO, SYRIA - SEPTEMBER 23: Collapsed buildings are seen after Syrian and Russian amry carried out an airstrike over the residential areas of Kellese town in Aleppo, Syria on September 23, 2016.
(Photo by Ibrahim ebu Leys/Anadolu Agency/Getty Images)
A Syrian man carries the body of his nephew following a reported airstrike on September 23, 2016, on the al-Muasalat area in the northern Syrian city of Aleppo.
Missiles rained down on rebel-held areas of Syria's Aleppo, causing widespread destruction that overwhelmed rescue teams, as the army prepared a ground offensive to retake the city. / AFP / THAER MOHAMMED (Photo credit should read THAER MOHAMMED/AFP/Getty Images)
Syrian men remove a baby from the rubble of a destroyed building following a reported air strike in the Qatarji neighbourhood of the northern city of Aleppo on September 21, 2016.
Heavy bombardment pummelled Aleppo city and the wider province, key battlegrounds in Syria's conflict. The Syrian Observatory for Human Rights said dozens of raids hit the city's east overnight, as regime troops advanced on rebels in Aleppo's southwestern outskirts. / AFP / AMEER ALHALBI (Photo credit should read AMEER ALHALBI/AFP/Getty Images)
Members of the Syrian Democratic Forces (SDF), one holding ammunition, stand on a street in the northern Syrian town of Manbij on August 7, 2016, as they comb the city in search of the last remaining jihadists, a day after they retook it from the Islamic State group.
A coalition of Arab and Kurd fighters on August 6, 2016 seized the Islamic State (IS) group stronghold of Manbij, two months after launching an operation to capture the strategic city in northern Syria, a monitor said. The town had served as a key transit point along IS's supply route from the Turkish border to Raqa, the de facto capital of its self-styled Islamic "caliphate". / AFP / DELIL SOULEIMAN (Photo credit should read DELIL SOULEIMAN/AFP/Getty Images)
TAJI, IRAQ - APRIL 12: A U.S. Army trainer (L), instructs Iraqi Army recruits at a military base on April 12, 2015 in Taji, Iraq. U.S. forces, currently operating in 5 large bases throught Iraq, are training thousands of Iraqi Army combat troops, trying to rebuild a force they had origninally trained before the U.S. withdrawal from Iraq in 2010. Members of the U.S. Army's 5-73 CAV, 3BCT, 82nd Airborne Division are teaching members of the newly-formed 15th Division of the Iraqi Army, as the Iraqi government launches offensives to try to recover territory lost to ISIS last year. (Photo by John Moore/Getty Images)
SALT LAKE CITY, UT - AUGUST 10: Former CIA agent Evan McMullin approaches the stage to announce his presidential campaign as an Independent candidate on August 10, 2016 in Salt Lake City, Utah. Supporters gathered in downtown Salt Lake City for the launch of his Utah petition drive to collect the 1000 signatures McMullin needs to qualify for the presidential ballot. (Photo by George Frey/Getty Images)