Foreign Minister Mahmoud Ali Youssouf greets U.S. Secretary of State Rex Tillerson at Djibouti International Airport, March 9, 2018. Secretary Tillerson met with Youssouf in Djibouti to discuss the U.S.-Djiboutian partnership, and exchanged views on bilateral concerns, security threats, and economic reforms. (U.S. Air National Guard photo by Staff Sgt. Allyson L. Manners)

U.S. Secretary of State Rex Tillerson meets with the Marine Security Guard Detachment at the U.S. Embassy in Djibouti, March 9, 2018. Secretary Tillerson traveled to Djibouti to discuss the U.S.-Djiboutian partnership, and exchanged views on bilateral concerns, security threats, and economic reforms. (U.S. Air National Guard photo by Staff Sgt. Allyson L. Manners)

U.S. Secretary of State Rex Tillerson poses for a photo with U.S. Army Brig. Gen. William L. Zana, Deputy Commander of Combined Joint Task Force - Horn of Africa, and U.S. Navy Capt. Nancy S. Lacore, Commander of Camp Lemonnier, at Camp Lemonnier, Djibouti, March 9, 2018. Secretary Tillerson traveled to Djibouti to discuss the U.S.-Djiboutian partnership, and exchanged views on bilateral concerns, security threats, and economic reforms. (U.S. Air National Guard photo by Staff Sgt. Allyson L. Manners)

U. S. Secretary of State Rex Tillerson meets with President Ismail Omar Guelleh at the Presidential Palace, Djibouti, March 9. 2018. Secretary Tillerson also met with Djiboutian Foreign Minister Mahmoud Ali Youssouf in Djibouti to discuss the U.S.-Djiboutian partnership, and exchanged views on bilateral concerns, security threats, and economic reforms. (U.S. Air National Guard photo by Staff Sgt. Allyson L. Manners)

U.S. Secretary of State Rex Tillerson speaks to personnel at the U.S. Embassy, Djibouti, March 9, 2018. Secretary Tillerson traveled to Djibouti to discuss the U.S.-Djiboutian partnership, and exchanged views on bilateral concerns, security threats, and economic reforms. (U.S. Air National Guard photo by Staff Sgt. Allyson L. Manners)

U.S. Secretary of State Rex Tillerson speaks at a joint press conference with the foreign minister Mahmoud Ali Youssouf at the Presidential Palace, Djibouti, March 9, 2018. Secretary Tillerson met with Youssouf in Djibouti to discuss the U.S.-Djiboutian partnership, and exchanged views on bilateral concerns, security threats, and economic reforms. (U.S. Air National Guard photo by Staff Sgt. Allyson L. Manners)