U.S. President Barack Obama and Afghan President Hamid Karzai meet to sign the Strategic Partnership Agreement at the Presidential Palace in Kabul, Afghanistan May 2, 2012. Obama arrived in Afghanistan on Tuesday to conclude an agreement charting future relations with the country, making the unannounced trip in darkness on the first anniversary of the killing of al Qaeda leader Osama bin Laden. The strategic partnership pact sets out a future U.S. role in Afghanistan, including aid and advisers, while trying to reassure Afghans that they will not be abandoned when most NATO combat troops leave in 2014. REUTERS/Kevin Lamarque (AFGHANISTAN – Tags: POLITICS MILITARY)