Kenyan girls attend an event for DREAMS, a U.S. funded public-private partnership to reduce HIV infections among vulnerable girls and young women, at a site supported by PEPFAR, the U.S. program to fight HIV/AIDS in Africa, at the St John's Community Centre in the Pumwani area of Nairobi, Kenya Saturday, March 10, 2018. U.S. Secretary of State Rex Tillerson was due to attend but canceled the day of events in Kenya due to illness, after a rigorous Africa schedule that included stops in three countries on Friday. (AP Photo/Ben Curtis)
Kenyan girl guides holding U.S. and Kenyan flags await the arrival of the U.S. Ambassador at a site supported by PEPFAR, the U.S. program to fight HIV/AIDS in Africa, at the St John's Community Centre in the Pumwani area of Nairobi, Kenya Saturday, March 10, 2018. U.S. Secretary of State Rex Tillerson was due to attend but canceled the day of events in Kenya due to illness, after a rigorous Africa schedule that included stops in three countries on Friday. (AP Photo/Ben Curtis)
Kenyan girl guides holding U.S. and Kenyan flags await the arrival of the U.S. Ambassador at a site supported by PEPFAR, the U.S. program to fight HIV/AIDS in Africa, at the St John's Community Centre in the Pumwani area of Nairobi, Kenya Saturday, March 10, 2018. U.S. Secretary of State Rex Tillerson was due to attend but canceled the day of events in Kenya due to illness, after a rigorous Africa schedule that included stops in three countries on Friday. (AP Photo/Ben Curtis)
U.S. Secretary of State Rex Tillerson, right, walks with Kenya's President Uhuru Kenyatta, left, past metal sculptures of animals, inside State House in Nairobi, Kenya Friday, March 9, 2018. (AP Photo/Ben Curtis)
U.S. Secretary of State Rex Tillerson, center, walks down the steps of a U.S. Air Force plane as he arrives in Nairobi, Kenya Friday, March 9, 2018. (AP Photo/Ben Curtis)