NAIROBI, Shawwal 05, 1436, July 21, 2015, SPA -- Kenya's President Uhuru Kenyatta says the fight against extremism will be the key topic of talks with U.S. President Barack Obama, who will be visiting the country later this week. Kenyatta said Tuesday that his country has been working closely with American security agencies in the fight against extremism and he hopes his meeting with Obama shall further strengthen this cooperation. --SPA 15:45 LOCAL TIME 12:45 GMT www.spa.gov.sa/w