Kuwait's Minister of Foreign Affairs Sheikh Sabah al Khalid Al Sabah, U.S. Secretary of State Rex Tillerson, European High Representative for Foreign Affairs Federica Mogherini, Qatari Foreign Minister Sheikh Mohammed bin Abdulrahman Al Thani and other delegates pose for a group photo ahead of the Kuwait International Conference for Reconstruction of Iraq, in Bayan, Kuwait February 13, 2018.

U.S. Secretary of State Rex Tillerson and Kuwait's Minister of Foreign Affairs Sheikh Sabah al Khalid Al Sabah attend a joint news conference, in Bayan, Kuwait February 13, 2018.

Kuwait Minister of Foreign Affairs Sheikh Sabah al Khalid Al Sabah poses for a group photo with U.S. Secretary of State Rex Tillerson and other Foreign Ministers and delegates ahead of the Kuwait International Conference for Reconstruction of Iraq, in Bayan, Kuwait February 13, 2018. REUTERS/Stephanie McGehee

U.S. envoy to the coalition against Islamic State Brett McGurk attends the Kuwait International Conference for Reconstruction of Iraq, in Bayan, Kuwait February 13, 2018.

Iraq's Foreign Minister Ibrahim al-Jaafari attends the Kuwait International Conference for Reconstruction of Iraq, in Bayan, Kuwait February 13, 2018.

Kuwait's Minister of Foreign Affairs Sheikh Sabah al Khalid Al Sabah attends the Kuwait International Conference for Reconstruction of Iraq, in Bayan, Kuwait February 13, 2018.

U.S. Secretary of State Rex Tillerson attends a joint news conference with Kuwait's Minister of Foreign Affairs Sheikh Sabah al Khalid Al Sabah (not pictured), in Bayan, Kuwait February 13, 2018.