Russian President Vladimir Putin attends a signing ceremony following a meeting with Egyptian President Abdel Fattah al-Sisi in the Black Sea resort of Sochi, Russia October 17, 2018. Pavel Golovkin/Pool via REUTERS

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi sit inside an Aurus limousine of the presidential motorcade in the Black Sea resort of Sochi, Russia October 17, 2018. Sputnik/Alexei Druzhinin/Kremlin via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY.

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi attend a meeting in the Black Sea resort of Sochi, Russia October 17, 2018. Pavel Golovkin/Pool via REUTERS

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi sit inside an Aurus limousine of the presidential motorcade in the Black Sea resort of Sochi, Russia October 17, 2018. Sputnik/Alexei Druzhinin/Kremlin via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY.

Egyptian President Abdel Fattah al-Sisi attends a signing ceremony following a meeting with Russian President Vladimir Putin in the Black Sea resort of Sochi, Russia October 17, 2018. Pavel Golovkin/Pool via REUTERS

Russian President Vladimir Putin attends a meeting with Egyptian President Abdel Fattah al-Sisi in the Black Sea resort of Sochi, Russia October 17, 2018. Pavel Golovkin/Pool via REUTERS

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi shake hands during a signing ceremony following their meeting in the Black Sea resort of Sochi, Russia October 17, 2018. Pavel Golovkin/Pool via REUTERS

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi walk after their meeting in the Black Sea resort of Sochi, Russia October 17, 2018. Sputnik/Alexei Druzhinin/Kremlin via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY.

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi walk along an embankment near the Olympic park in the Black Sea resort of Sochi, Russia October 16, 2018. Sputnik/Alexei Druzhinin/Kremlin via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY.

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi shake hands during a signing ceremony following their meeting in the Black Sea resort of Sochi, Russia October 17, 2018. Pavel Golovkin/Pool via REUTERS

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi attend an informal dinner in the Black Sea resort of Sochi, Russia October 16, 2018. Sputnik/Alexei Druzhinin/Kremlin via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY.

Russian President Vladimir Putin and Egyptian President Abdel Fattah al-Sisi walk along an embankment near the Olympic park in the Black Sea resort of Sochi, Russia October 16, 2018. Sputnik/Alexei Druzhinin/Kremlin via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY.