Lt. Gen. Michael Flynn arrives for a meeting with US President-elect Donald Trump at Trump Tower December 12, 2016 in New York. / AFP / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
LONDON, ENGLAND - FEBRUARY 05: Wikileaks founder Julian Assange prepares to speak from the balcony of the Ecuadorian embassy where he continues to seek asylum following an extradition request from Sweden in 2012, on February 5, 2016 in London, England. The United Nations Working Group on Arbitrary Detention has insisted that Mr Assange's detention should be brought to an end. (Photo by Carl Court/Getty Images)
A man watches a television screen reporting news of North Korea's latest submarine-launched ballistic missile test at a railway station in Seoul on August 25, 2016.
North Korean leader Kim Jong-Un declared a recent submarine-launched ballistic missile (SLBM) test the "greatest success", Pyongyang's state media said on August 25. / AFP / JUNG YEON-JE (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
Turkey's Prime Minister Recep Tayyip Erdogan (R) speaks with Russia's President Vladimir Putin in Istanbul on December 3, 2012. Putin arrived in Istanbul on December 3 for a landmark visit due to focus on resolving differences with Turkey over the 20-month crisis in war-ravaged Syria. AFP PHOTO / POOL / TOLGA BOZOGLU (Photo credit should read TOLGA BOZOGLU/AFP/Getty Images)
Armed men in uniform identified by Syrian Democratic forces as US special operations forces ride in the back of a pickup truck in the village of Fatisah in the northern Syrian province of Raqa on May 25, 2016.
US-backed Syrian fighters and Iraqi forces pressed twin assaults against the Islamic State group, in two of the most important ground offensives yet against the jihadists. The Syrian Democratic Forces (SDF), formed in October 2015, announced on May 24 its push for IS territory north of Raqa city, which is around 90 kilometres (55 miles) south of the Syrian-Turkish border and home to an estimated 300,000 people. The SDF is dominated by the Kurdish People's Protection Units (YPG) -- largely considered the most effective independent anti-IS force on the ground in Syria -- but it also includes Arab Muslim and Christian fighters.
/ AFP / DELIL SOULEIMAN (Photo credit should read DELIL SOULEIMAN/AFP/Getty Images)
TOPSHOT - A picture taken on October 17, 2016 shows an employee walking behind a glass wall with machine coding symbols at the headquarters of Internet security giant Kaspersky in Moscow. / AFP / Kirill KUDRYAVTSEV / TO GO WITH AFP STORY BY Thibault MARCHAND (Photo credit should read KIRILL KUDRYAVTSEV/AFP/Getty Images)
This picture taken on an undisclosed date in December 2016 shows a Chinese J-15 fighter jet preparing to take off from the deck of the Liaoning aircraft carrier during military drills in the Bohai Sea, off China's northeast coast.
China's Liaoning aircraft carrier battle group has conducted its first exercises with live ammunition, the country's navy said, in a show of strength as tensions with the US and Taiwan escalate. China's first and only aircraft carrier led large-scale exercises in the Bohai Sea, the People's Liberation Army Navy said late on December 15, 2016 in a statement on their website. / AFP / STR / China OUT (Photo credit should read STR/AFP/Getty Images)
FORT WORTH, TX - NOVEMBER 06: A B-52 bomber flys over the track during pre-race activities prior to the start of the NASCAR Sprint Cup Series AAA Texas 500 at Texas Motor Speedway on November 6, 2011 in Fort Worth, Texas. (Photo by John Harrelson/Getty Images for NASCAR)
Russian Foreign Minister Sergei Lavrov (C), his Turkish counterpart Mevlut Cavusoglu (R) and Iran's Foreign Minister Mohammad Javad Zarif attend a news conference in Moscow on December 20, 2016.
The foreign and defence ministers of Russia, Turkey and Iran are meeting in Moscow for key talks on the conflict in Syria. Iran and Russia are sharing a base in war-torn Syria to help coordinate their support for President Bashar al-Assad's forces, a top security official in Tehran said on December 20.
/ AFP / Natalia KOLESNIKOVA (Photo credit should read NATALIA KOLESNIKOVA/AFP/Getty Images)
GOLDEN, CO - OCTOBER 29: Republican presidential nominee Donald Trump addresses a campaign rally in the Rodeo Arena at the Jefferson County Fairgrounds October 29, 2016 in Golden, Colorado. The Federal Bureau of Investigation announced Friday it discovered emails pertinent to the closed investigation of Democratic presidential nominee Hillary Clinton's private email server and are looking to see if they improperly contained classified information. Trump said "I think it's the biggest story since Watergate." (Photo by Chip Somodevilla/Getty Images)
Russian Foreign Minister Sergei Lavrov (R) welcomes his Iranian counterpart Mohammad Javad Zarif (L) during their meeting in Moscow on December 20, 2016. / AFP / Natalia KOLESNIKOVA (Photo credit should read NATALIA KOLESNIKOVA/AFP/Getty Images)
CAMP LEJEUNE, NC - FEBRUARY 22: Sgt. Jarrod Simmons tries to motivate his squad of Marines before they head out on a 10 kilometer training march carrying 55 pound packs during Marine Combat Training (MCT) on February 22, 2013 at Camp Lejeune, North Carolina. Since 1988 all non-infantry enlisted male Marines have been required to complete 29 days of basic combat skills training at MCT after graduating from boot camp. MCT has been required for all enlisted female Marines since 1997. About six percent of enlisted Marines are female. (Photo by Scott Olson/Getty Images)
WASHINGTON, DC - DECEMBER 16: U.S. President Barack Obama answers questions during a news conference in the Brady Press Breifing Room at the White House December 16, 2016 in Washington, DC. In what could be the last press conference of his presidency, afterwards Obama will be leaving for his annual family vacation in Hawaii. (Photo by Chip Somodevilla/Getty Images)