CHENGDU, CHINA - JULY 07: Large military transport aircraft Xian Y-20 parks at an air force base after column-mounted air force on July 7, 2016 in Chengdu, Sichuan Province of China. Developed by Xi'an Aircraft Industrial Corporation and officially launched in 2006, the aircraft Y-20 is the first cargo aircraft to use 3-D printing technology to speed up its development and to lower its manufacturing cost. It can be deployed in the transportation of personnel and heavy equipment during military assault, and humanitarian assistance and peacekeeping missions. It can also be configured for airborne early warning and control (AEW&C), anti-submarine warfare (ASW) and aerial refuelling missions. (Photo by VCG)***_***
WASHINGTON, DC - JUNE 03: U.S. Navy officers photograph Marine One as it lifts off the South Lawn with President Barack Obama on board at the White House June 3, 2016 in Washington, DC. Obama is traveling to Miami, FL, to attend Democratic National Committee meetings and fundraisers and then overnighting in Palm City. (Photo by Chip Somodevilla/Getty Images)
Iraqi men who fled the towns of al-Shirqat and Qayyarah during reported fighting between Iraqi government forces and jihadists of the Islamic State (IS) group, wait for inspection by security forces on the outskirts of al-Shirqat before being transferred to a camp for displaced people on July 27, 2016.
IS overran large areas north and west of Baghdad in 2014, but Iraqi forces have since regained significant ground and are conducting operations to set the stage for the battle to recapture Mosul, the last IS-held city in the country.
/ AFP / AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)
ARLINGTON, VA - DECEMBER 14: (AFP OUT) U.S. President Barack Obama delivers a statement on the counter-ISIL campaign in the Pentagon briefing room December 14, 2015 in Arlington, Virginia. President Obama met previously with a National Security Council on the counter-ISIL campaign. (Photo by Olivier Douliery-Pool/Getty Images)
ANKARA, TURKEY - AUGUST 01: The Chairman of the Joint Chiefs of Staff of the United States, Joseph Dunford (L) meets with the Chief of the General Staff of the Turkish Armed Forces, Hulusi Akar (R) at Turkish General Staff in Ankara, Turkey on August 01, 2016.
(Photo by Turkish Armed Forces/Anadolu Agency/Getty Images)
Members of Patriotic Party shout slogans and hold banners and placards as they march in front of the US embassy in Ankara of August 1, 2016 during a protest against the visit of American General Joseph Dunford, chairman of the US joint chiefs of staff.
Turkey's military and political leaders were to meet on July 1 in Ankara with the top US military commander in the first direct talks since last month's failed coup. General Joseph Dunford, chairman of the US joint chiefs of staff, will meet with Turkish chief of staff General Hulusi Akar and Prime Minister Binali Yildirim in the Turkish capital.
Tensions between the two NATO allies have been aggravated by the foiled July 15 putsch by rogue elements in the military who sought to bring down the government of President Recep Tayyip Erdogan.
/ AFP / ADEM ALTAN (Photo credit should read ADEM ALTAN/AFP/Getty Images)
IZMIR, TURKEY - JULY 16 : One of the eight detained soldiers, allegedly involved in "Parallel State/Gulenist Terrorist Organization"s coup attempt and carried out an raid to a hotel, where Turkish President Recep Tayyip Erdogan stayed, is being escorted to a vehicle before their court, in Izmir, Turkey on July 16, 2016. Parallel state is an illegal organization backed by U.S.-based preacher Fetullah Gulen.
(Photo by Mustafa Yildirim/Anadolu Agency/Getty Images)
ANKARA, TURKEY - JULY 29: Turkish President Recep Tayyip Erdogan visits Police Special Operation Department's Headquarters in Golbasi district of Ankara, Turkey on July 29, 2016 after the failed military coup attempt on July 15, 2016. Turkish officials accuse U.S.-based Turkish citizen Fetullah Gulen plotting to overthrow the government of President Erdogan as the culmination of a long running campaign to infiltrate Turkish institutions including the military, the police and the judiciary. (Photo by Kayhan Ozer/Anadolu Agency/Getty Images)
PHILADELPHIA, PA - JULY 28: (EDITORS NOTE: This image was converted using digital filters) Democratic presidential candidate Hillary Clinton speaks to the audience at the 2016 Democratic National Convention at Wells Fargo Center on July 25, 2016 in Philadelphia, Pennsylvania. (Photo by Mike Coppola/WireImage)
JALALABAD, July 26, 2016 -- Soldiers take part in a military operation against the Islamic State in Kot district of Nangarhar province, Afghanistan, on July 26, 2016. Militants loyal to the ultra-extremist group of the Islamic State have suffered major setback as 122 fighters of the armed outfit have been killed in the eastern Nangarhar province over the past 24 hours, spokesman for provincial government Attaullah Khogiani said Tuesday. (Xinhua/Rahman Safi via Getty Images)
ALEPPO, SYRIA - JULY 27 : Civil defense members and citizens try to rescue people from the site of Russian forces' attack on opposition controlled Sahour neighbourhood of Aleppo, Syria on July 27, 2016. (Photo by Mamun Ebu Omer/Anadolu Agency/Getty Images)
WASHINGTON D.C., July 14, 2016-- U.S. FBI Director James Comey, right, and U.S. Homeland Security chief Jeh Johnson testify before the House Homeland Security Committee on Capitol Hill in Washington D.C., capital of the United States, July 14, 2016. U.S. Homeland Security chief Jeh Johnson warned on Thursday of possible violence during the upcoming Republican National Convention. (Xinhua/Bao Dandan via Getty Images)
PHILIPPINE SEA - JUNE 18: In this handout provided by the U.S. Navy, The Nimitz-class aircraft carriers USS John C. Stennis (CVN 74), center, and USS Ronald Reagan (CVN 76) conduct dual aircraft carrier strike group operations in the U.S. 7th Fleet area of operations in support of security and stability in the Indo-Asia-Pacific. (Photo by Specialist 3rd Class Jake Greenberg/U.S. Navy via Getty Images)
NEW YORK, NY - DECEMBER 18 Foreign Minister of Russia Sergey Lavrov and US Secretary of State John Kerry speak at a news conference after a United Nations Security Council meeting on Syria at the United Nations in New York on December 18, 2015. 20 nations from around the world gathered to discuss the ongoing conflict. (Photo by Andrew Renneisen/Getty Images)