Diplomacy

Journalists and activists attempt to block police car carrying two Reuters journalists leaving from the court Monday, Sept. 3, 2018, in Yangon, Myanmar. The court sentenced two Reuters journalists to seven years in prison Monday for illegal possession of official documents, a ruling that comes as international criticism mounts over the military's alleged human rights abuses against Rohingya Muslims. (AP Photo/Thein Zaw)

Dutch police officers point their guns at a wounded 19-year-old man who was shot by police after stabbing two people in the central railway station in Amsterdam, the Netherlands, Friday Aug. 31, 2018. Police investigators in Amsterdam included an extremist attack as a possible motive for the stabbings of two people at a busy railway station Friday as authorities in the Dutch capital reported that the suspect shot by police is an Afghan citizen. (AP Photo)

Canada's Foreign Affairs Minister Chrystia Freeland speaks to the media as she arrives for trade talks at the Office of the United States Trade Representative, Thursday, Aug. 30, 2018, in Washington. (AP Photo/Jacquelyn Martin)

FILE - In this April 25, 2018, file photo, UN Special Envoy of the Secretary-General on Syria Staffan de Mistura addresses the media during a conference 'Supporting the future of Syria and the region' at the EU Council in Brussels. Fearing a military offensive, the U.N. envoy for Syria proposed Thursday, Aug. 30, that civilians holed up in the rebel-held region of Idlib could evacuate to government-held areas, a move that would in essence send many back into parts of Syria they once fled in its 7-1/2-year-old war. De Mistura expresses fears of a “perfect storm” that could have a devastating impact on nearly 3 million people, nearly half of whom arrived from elsewhere in Syria, in the region largely controlled by al-Qaida-linked fighters. (AP Photo/Geert Vanden Wijngaert, File)

FILE - In this Nov. 11, 2017, file photo, Notre Dame head coach Brian Kelly walks on the field before an NCAA college football game against Miami in Miami Gardens, Fla. Notre Dame hosts Michigan on Saturday, Sept. 1, to open the college football season. (AP Photo/Lynne Sladky, File)

In this photo taken on Monday, Aug. 27, 2018, Cafer Topkaya, a former naval officer posted to NATO, gestures, during an interview in his apartment in Brussels. After more than a year in prison in Turkey, Topkaya, fled the country and a potentially heavy sentence for crimes he says he did not commit. (AP Photo/Virginia Mayo)

FILE - In this Sept. 19, 2013, file photo, smoke rises after a TNT bomb was thrown from a helicopter, hitting a rebel position during heavy fighting between troops loyal to president Bashar Assad and opposition fighters, in a neighbouring village to Kafr Nabuda, in the Idlib province countryside, Syria. The campaign for Idlib, the opposition’s only remaining stronghold in the country and now a refuge for over one million displaced Syrians, is likely to be the last major theater of battle after seven years of brutal civil war. (AP Photo/File)

FILE - In this Sunday Oct. 1, 2017 file photo, a truck waits outside a closed petrol station of the Nile Petroleum Corporation in Juba, South Sudan. South Sudan says it will resume oil production in a key region in September 2018 to make up for more than $4 billion of revenue lost during years of fighting. (AP Photo/Sam Mednick, File)

Since March last year, the U.N.'s humanitarian aid agency has said Yemen — already the Arab world's poorest country — is facing the world's worst humanitarian crisis.