Defense Secretary Ash Carter, left, and CIA Director John Brennan follow President Barack Obama and Saudi Arabia’s King Salman to the presidents motorcade after meeting at Erga Palace in Riyadh, Saudi Arabia, Wednesday, April 20, 2016. The president began a six day trip to strategize with his counterparts in Saudi Arabia, England and Germany on a broad range of issues with efforts to rein in the Islamic State group being the common denominator in all three stops. (AP Photo/Carolyn Kaster)