President Obama and Hamid Karzai signed a strategic partnership agreement Tuesday, laying out the U.S.'s role in Afghanistan through 2024. Obama paid a surprise visit to the Bagram Air Force Base, telling the troops, "There is a light on the horizon because of the sacrifices you've made. And that's the reason, for Michelle and me, nothing's more important than looking after your families while you're here. And I want everyone to know when you get home, we're going to be here for you because when you're in uniform and we will stay there for you when you're out of uniform—because you've earned it." Obama concluded, "I could not be prouder to be your commander in chief."