President Barack Obama greets Australian troops during a visit to Royal Army Air Force Base in Darwin, Australia, Thursday, Nov. 17, 2011. (AP Photo/Susan Walsh)
President Obama Visits US Marines & Australian Troops at Royal Army Air Force Base
President Obama Visits US Marines & Australian Troops at Royal Army Air Force Base
President Barack Obama greets Australian troops during a visit to Royal Army Air Force Base in Darwin, Australia, Thursday, Nov. 17, 2011. (AP Photo/Susan Walsh)