Security pact delay hampers NATO plans for post-2014 Afghanistan --- (Reuters) - NATO has agreed the outline of a military force it intends to keep in Afghanistan after its combat mission there ends next year, but troop numbers remain uncertain due to ongoing talks between Washington and Kabul. --- NATO defense ministers endorsed a "strategic planning assessment" on Wednesday, setting out command and control arrangements and the capabilities needed for the mission that the alliance says will have a training and advisory role, U.S. and NATO officials said. -- Once the U.S.-Afghan agreement is sealed, NATO must negotiate a similar agreement with Afghanistan creating the legal basis for other NATO nations to keep troops there.