NEW : Obama pledges U.S. commitment to Afghanistan beyond 2014 . Today : President Obama thanks America for its support . Earlier today , the United States turned over a prison to Afghan control . Kerry makes an unannounced visit to Afghanistan to meet with Obama .
NEW : Kerry pledges U.S. commitment to Afghanistan beyond 2014 . NEW : President Karzai thanks America for its support . Earlier Monday , the United States turns over a prison to Afghan control . Kerry makes an unannounced visit to Afghanistan to meet with Karzai .