NEW : Prisoner exchanges will be on the agenda . NEW : The U.S. wants State Department . Bowe Bergdahl to be released , official says . NEW : U.S. , Afghan governments in `` close coordination , '' Sgt official says . 4 Americans killed at U.S. base in Afghanistan ; Taliban claim responsibility . NEW : Obama : Afghan President Bowe Bergdahl remains committed to political reconciliation .
NEW : Prisoner exchanges will be on the agenda . NEW : The U.S. wants State Department . Bowe Bergdahl to be released , official says . NEW : U.S. , Afghan governments in `` close coordination , '' Sgt official says . NEW : Obama : Afghan President Bowe Bergdahl remains committed to political reconciliation .