Saudi Arabia's King Salman bin Abdulaziz Al Saud receives Bahrain's King Hamad bin Isa Al Khalifa ahead of the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud attends the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
The Gulf Cooperation Council's (GCC) Leaders are seen ahead of their Summit meeting in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's Crown Prince Mohammed bin Salman talks with Saudi Arabia's King Salman bin Abdulaziz Al Saud during the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud receives Prime Minister and Vice-President of the United Arab Emirates and ruler of Dubai Sheikh Mohammed bin Rashid al-Maktoum ahead of the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS
Prime Minister and Vice-President of the United Arab Emirates and ruler of Dubai Sheikh Mohammed bin Rashid al-Maktoum attends the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's Crown Prince Mohammed bin Salman shakes hands with Prime Minister and Vice-President of the United Arab Emirates and ruler of Dubai Sheikh Mohammed bin Rashid al-Maktoum during the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Oman's Deputy Prime Minister, Fahad bin Mahmood attends the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud attends the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud talks with Kuwaiti Emir Sheikh Sabah al-Ahmad al-Jaber al-Sabah ahead of the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Kuwaiti Emir Sheikh Sabah al-Ahmad al-Jaber al-Sabah attends the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
The Gulf Cooperation Council's (GCC) Leaders are seen ahead of their Summit meeting in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud talks with Bahrain's King Hamad bin Isa Al Khalifa ahead of the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud talks with Prime Minister and Vice-President of the United Arab Emirates and ruler of Dubai Sheikh Mohammed bin Rashid al-Maktoum ahead of the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud talks with Oman's Deputy Prime Minister, Fahad bin Mahmood ahead of the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
Saudi Arabia's King Salman bin Abdulaziz Al Saud receives Bahrain's King Hamad bin Isa Al Khalifa ahead of the Gulf Cooperation Council's (GCC) Summit in Riyadh, Saudi Arabia December 9, 2018. Bandar Algaloud/Courtesy of Saudi Royal Court/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY
The Gulf Cooperation Council's (GCC) Summit in Riyadh