BRUSSELS, BELGIUM - FEBRUARY 11: Saudi Arabia's Defense Minister Mohammad Bin Salman Al Saud attends the anti-Daesh coalition conference at NATO headquarters in Brussels, Belgium on February 11, 2016. The counter-Deash defense ministers conference, in Brussels, comprises 27 nations, including the United States, that provide force contributions to the counter-Daesh campaign. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images)
WASHINGTON, DC - JUNE 9: House Speaker Paul Ryan, (R-WI) adjusts his tie before a session on "Protecting the U.S. Homeland" at The Council on Foreign Relations on June 9, 2016, in Washington, D.C. Ryan was to unveil a national security plan during the event. (Photo by Allison Shelley/Getty Images)
Indian Prime Minister Narendra Modi shakes Vice President Joe Biden's hand after addressing a joint session of Congress on Capitol Hill on June 8, 2016, in Washington, DC. / AFP / MOLLY RILEY (Photo credit should read MOLLY RILEY/AFP/Getty Images)
NEW YORK, NY - JUNE 16: Business mogul Donald Trump points as he gives a speech as he announces his candidacy for the U.S. presidency at Trump Tower on June 16, 2015 in New York City. Trump is the 12th Republican who has announced running for the White House. (Photo by Christopher Gregory/Getty Images)
PARIS, FRANCE - NOVEMBER 14: A victim's body lies covered on Boulevard des Filles du Calvaire, close to the Bataclan theater, early on November 14, 2015 in Paris, France. According to reports, over 150 people were killed in a series of bombings and shootings across Paris, including at a soccer game at the Stade de France and a concert at the Bataclan theater. (Photo by Thierry Chesnot/Getty Images)
Syrians unload boxes from a lorry after an aid convoy of the International Committee of the Red Cross (ICRC) and the Syrian Arab Red Crescent entered the rebel-held town of Rastan, in central Homs province, on April 25, 2016.
Relief groups began their second major aid delivery in a week to tens of thousands of besieged people in central Syria. Thirty-five aid trucks would be delivered to Rastan and surrounding rural areas, said International Committee of the Red Cross spokesman Pawel Krzysiek. / AFP / MAHMOUD TAHA (Photo credit should read MAHMOUD TAHA/AFP/Getty Images)
WASHINGTON, DC - SEPTEMBER 04: U.S. President Barack Obama looks on as King Salman bin Abd alAziz of Saudi Arabia speaks during a bilateral meeting in the Oval Office of the White House September 4, 2015 in Washington, D.C. The President and the King were expected to discuss various issues including joint security and counter-terrorism efforts (Photo by Olivier Douliery-Pool/Getty Images)
Saudi new King Salman (C), Crown Prince Moqren bin Abdul Aziz (3L) and deputy Crown Prince and Interior Minister Mohammed bin Nayef (L) walk to greet US President Barack Obama (unseen) and First Lady Michelle Obama (unseen) at King Khalid International Airport in Riyadh on January 27, 2015. Obama landed in Saudi Arabia to shore up ties with new King Salman and offer condolences after the death of his predecessor Abdullah. AFP PHOTO / SAUL LOEB / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
QUETTA, PAKISTAN - MAY 22 : Wreckage of a destroyed vehicle in which Mullah Mohammad Akhtar Mansour was allegedly traveling in Noshki, Balochistan province is seen after it was hit by US drone on May 22, 2016. According to reports a US drone attacked a vehicle said to be carrying Mullah Mansoor and his driver in Noshki, Balochistan province, Pakistan. (Photo by Barkat Tareen /Anadolu Agency/Getty Images)
UNITED STATES - APRIL 27 - Republican presidential candidate Donald Trump speaks about his foreign policy positions during an event sponsored by The Center for the National Interest, at The Mayflower Hotel, in Washington, Wednesday, April 27, 2016. (Photo By Al Drago/CQ Roll Call)
NATO secretary general Jens Stoltenberg holds a press conference during a NATO foreign ministers meeting at the NATO headquarters in Brussels on December 2, 2014. NATO foreign ministers met in Brussels aiming to plot a new course after a "year of aggression" from Ukraine to the Middle East and the end of the alliance's combat mission in Afghanistan. AFP PHOTO/JOHN THYS (Photo credit should read JOHN THYS/AFP/Getty Images)
Representative Brad Sherman, a Democrat from California, talks to his communications director at his office on Capitol Hill in Washington, D.C., U.S., on Wednesday, Nov. 4, 2015. Janet Yellen can stay on GodÕs path by waiting until springtime to raise interest rates, Congressman Sherman told the Federal Reserve chair during a House Financial Services Committee hearing. Photographer: Andrew Harrer/Bloomberg via Getty Images
White House Deputy National Security Advisor Ben Rhodes speaks to reporters in the briefing room of the White House April 7, 2015 in Washington, DC. Rhodes was speaking about the suspected cyber attack on US government systems last year. AFP PHOTO/BRENDAN SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)