NEW YORK, NY - SEPTEMBER 24: U.S. President Barack Obama speaks at the 69th United Nations General Assembly at United Nations Headquarters on September 24, 2014 in New York City. The annual event brings political leaders from around the globe together to report on issues meet and look for solutions. This year's General Assembly has highlighted the problem of global warming and how countries need to strive to reduce greenhouse gas emissions. (Photo by Andrew Burton/Getty Images)
A man walks past a television screen showing a news broadcast on North Korea's nuclear test at Gimhae International Airport in Busan, South Korea, on Friday, Sept. 9, 2016. North Korea conducted its fifth nuclear test on Friday, the anniversary of the reclusive nation's founding, and said it was now able to produce miniaturized nuclear arms. Photographer: SeongJoon Cho/Bloomberg via Getty Images
UNITED STATES - JUNE 29: Sen. Rand Paul, R-Ky., finishes remarks during a news conference in the Capitol with other republican Senators, held to voice their objection to the senate recessing at the end of the week with looming economic issues, such as raising the debt ceiling, remaining unresolved. Also appearing from left are, Sens. Jeff Sessions, R-Ala., Kelly Ayotte, R-N.H., Ron Johnson, R-Wisc., David Vitter, R-La., John Cornyn, R-Texas, and Marco Rubio, R-Fla. (Photo By Tom Williams/Roll Call)
US Marine General (Ret.) John Allen speaks during the final day of the 2016 Democratic National Convention on July 28, 2016, at the Wells Fargo Center in Philadelphia, Pennsylvania. / AFP / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
NEW YORK, NY - SEPTEMBER 24: U.S. President Barack Obama speaks at the 69th United Nations General Assembly at United Nations Headquarters on September 24, 2014 in New York City. The annual event brings political leaders from around the globe together to report on issues meet and look for solutions. This year's General Assembly has highlighted the problem of global warming and how countries need to strive to reduce greenhouse gas emissions. (Photo by Andrew Burton/Getty Images)
State Department Spokesman John Kirby speaks during the daily briefing at the State Department on January 6, 2015 in Washington, DC. Even as world powers work to implement the Iran nuclear deal, North Korea's apparent detonation of a new bomb marks a stark setback for global anti-proliferation efforts. Kirby's message to Pyongyang was clear -- "we have consistently made clear that we will not accept it as a nuclear state" -- but not new. AFP PHOTO/MANDEL NGAN / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
A Sensor Fuzed Weapon (SFW), manufactured by Textron Systems Corp., a unit of Textron Inc., stands on display during Aero India air show at Air Force Station Yelahanka in Bengaluru, India, on Thursday, Feb. 19, 2015. The bi-annual Aero India exhibit is the premier event for nations and companies to get a piece of the $150 billion that the world's biggest arms importer plans to spend on modernizing its military. Photographer: Dhiraj Singh/Bloomberg via Getty Images
Smoke billows following an air-strike by Saudi-led coalition on May 11, 2015, in the capital Sanaa. The raid targeted an arms depot in the Mount Noqum area on the eastern outskirts of Sanaa, triggering several blasts, an AFP correspondent and witnesses said. AFP PHOTO / MOHAMMED HUWAIS (Photo credit should read MOHAMMED HUWAIS/AFP/Getty Images)
WASHINGTON, DC - MAY 09: Secretary of State Hillary Clinton and Crown Prince of Bahrain Sheikh Salman bin Hamad bin Isa Al-Khalifa, speak to the media before a meeting at the State Department, on May 9, 2012 in Washington, DC. Secretary Clinton and the Crown Prince participated in a bilateral meeting on bi-lateral reginal issues. (Photo by Mark Wilson/Getty Images)
SAYLORSBURG, PA - JULY 17: (CHINA OUT, SOUTH KOREA OUT) Turkish Preacher Fethullah Gulen speaks during a group interview on July 17, 2016 in Saylorsburg, Pennsylvania. Gulen has been accused by Turkish President Recep Tayyip Erdogan that he is behind the foiled military coup attempt. (Photo by The Asahi Shimbun via Getty Images)
TAIZ, YEMEN - AUGUST 11: Soldiers of People's Resistance Forces, loyal to President of Yemen AbdRabbuh Mansur Hadi attack Houthi forces as they recapture Kureyis region from Houthi forces, in Taiz, Yemen on August 11, 2016.
(Photo by Abdulnasser Alseddik/Anadolu Agency/Getty Images)