Security personnel guard Saudi Arabia's consulate in Istanbul, Monday, Oct. 22, 2018. Saudi Crown Prince Mohammed bin Salman called the son of Jamal Khashoggi, the kingdom announced early Monday, to express condolences for the death of the journalist killed at the Saudi Consulate in Istanbul by officials that allegedly included a member of the royal's entourage. (AP Photo/Lefteris Pitarakis)

In this photo provided by South Korea Defense Ministry, the U.S.-led United Nations Command, left, South Korean, center, and North Korean, right, military officers attend a meeting at the southern side of Panmunjom in the Demilitarized Zone, South Korea, Monday, Oct. 22, 2018. Military officers from the two Koreas and the U.S.-led U.N. Command met again at the Koreas' border village Monday to examine an ongoing effort to disarm the area. (South Korea Defense Ministry via AP)

FILE - In this Oct. 13, 2018, file photo, a fighter of Syrian opposition stands at a checkpoint in northwestern city of Idlib, Syria. A Turkish official says Friday, Oct. 19, 2018, that a summit between the leaders of Turkey, France, Germany and Russia will be held in Istanbul this month to discuss the conflict in Syria. Presidential spokesman Ibrahim Kalin, in a written statement Friday said a summit will take place on Oct. 27. Russia and Turkey reached an agreement last month to set up a demilitarized zone around the northwestern Syrian province of Idlib preventing a government offensive on the last rebel stronghold in the country.(Ugur Can/DHA via AP, File)

Italian Economy Minister Giovanni Tria, left, and European Commissioner for Economic and Financial Affairs Pierre Moscovici meet the media during a press conference in Rome, Thursday, Oct. 18, 2018. Italian leaders say the budget plan will boost economic growth through higher spending, but other EU countries are concerned it will add to Italy's already heavy public debt load. (AP Photo/Gregorio Borgia)

South Korean President Moon Jae-in, left, talks with Pope Francis during a private audience at the Vatican, Thursday, Oct. 18, 2018. South Korea's president is in Italy for a series of meetings that culminated with an audience with Pope Francis at which he's expected to extend an invitation from North Korean leader Kim Jong Un to visit. (Alessandro Di Meo/ANSA via AP)

British Prime Minister Theresa May arrives for an EU summit at the Europa building in Brussels, Thursday, Oct. 18, 2018. EU leaders meet for a second day on Thursday to discuss migration, cybersecurity and to try and move ahead on stalled Brexit talks. (AP Photo/Olivier Matthys)

A pro-EU demonstrator holds up an EU flag to oncoming traffic outside the Palace of Westminster as the British government holds a cabinet meeting on Brexit inside 10 Downing Street, London, Tuesday, Oct. 16, 2018. The Brexit agreement must be sealed in the coming weeks to leave enough time for relevant parliaments to ratify it, but talks continue, particularly over how to ensure no physical border dividing the UK from Northern Ireland and the EU member state of Ireland. (AP Photo/Alastair Grant)

British Prime Minister Theresa May speaks with the media as she arrives for an EU summit at the Europa building in Brussels, Thursday, Oct. 18, 2018. EU leaders meet for a second day on Thursday to discuss migration, cybersecurity and to try and move ahead on stalled Brexit talks. (AP Photo/Francisco Seco)

A pro-EU demonstrator holds up an EU flag to oncoming traffic outside the Palace of Westminster as the British government holds a cabinet meeting on Brexit inside 10 Downing Street, London, Tuesday, Oct. 16, 2018. The Brexit agreement must be sealed in the coming weeks to leave enough time for relevant parliaments to ratify it, but talks continue, particularly over how to ensure no physical border dividing the UK from Northern Ireland and the EU member state of Ireland. (AP Photo/Alastair Grant)