North Korean leader Kim Jong Un meets with South Korean President Moon Jae-in (not pictured) during their summit at the truce village of Panmunjom, North Korea, in this handout picture released by North Korea's Korean Central News Agency (KCNA) on May 27, 2018. KCNA/via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT.
Russian President and Presidential candidate Vladimir Putin delivers a speech during a rally and concert marking the fourth anniversary of Russia's annexation of the Crimea region, at Manezhnaya Square in central Moscow, Russia March 18, 2018. Alexander Zemlianichenko/POOL via Reuters
A picture taken on February 3, 2018, in the town of Afrin shows the mother (C), brother (R) and sister (L) of the late 23-year-old YPJ fighter Barin Kobani, attending a mourning ceremony in her honor, after the YPJ and the Syrian Observatory for Human Rights accused Turkish-backed Syrian rebels of filming her mutilated dead body. / AFP PHOTO / Delil souleiman (Photo credit should read DELIL SOULEIMAN/AFP/Getty Images)
U.S. President Barack Obama, left, shakes hands during a bilateral meeting with African Union Commission chairperson, Dr. Nkosazana Dlamini Zuma, at the African Union, Tuesday, July 28, 2015, in Addis Ababa, Ethiopia. On the final day of his African trip, Obama is focusing on economic opportunities and African security. (AP Photo/Evan Vucci)
Oliver Lanyon, Senior Ranger in the Great Barrier Reef region for the Queenlsand Parks and Wildlife Service, takes photographs and notes during an inspection of the reef's condition in an area called the 'Coral Gardens' located at Lady Elliot Island and 80 kilometers north-east from the town of Bundaberg in Queensland, Australia, in this June 11, 2015 file photo. REUTERS/David Gray/Files
DAMASCUS, SYRIA - APRIL 08: An affected Syrian kid receives medical treatment after Assad regime forces allegedly conducted poisonous gas attack to Duma town of Eastern Ghouta in Damascus, Syria on April 08, 2018. At least 78 civilians dead, including women and children, according to the initial findings. (Photo by Mouneb Taim/Anadolu Agency/Getty Images)
Russian Foreign Minister Sergei Lavrov attends a ceremony to unveil a commemorative plaque, dedicated to Russian former ambassador to Turkey Andrei Karlov, who was assassinated in 2016, in Moscow, Russia December 19, 2017. REUTERS/Maxim Shemetov