It seeks to create an enduring partnership that prevents the Taliban from waiting until the U.S. withdrawal to try to regain power , the senior administration officials said . NEW : Car bomb in Kabul kills 5 after Obama visit . Facing an election at home , the president says `` this time of war '' will end . Romney lauds Afghan troops as they fight Taliban insurgents on their own soil. , says Afghanistan `` success '' is vital . Obama and Afghan President Hamid Karzai sign an agreement on future cooperation .
NEW : Car bomb in Kabul kills 5 after Obama visit . Facing an election at home , the president says `` this time of war '' will end . Romney lauds Afghan troops as they fight Taliban insurgents on their own soil. , says Afghanistan `` success '' is vital . Obama and Afghan President Hamid Karzai sign an agreement on future cooperation .