Over 18 years after the war began, the accord sets the stage for US troop pullout from Afghanistan. If the deal is successful, the "graveyard of empires" will have once again successfully turned away another world power from its landlocked borders.
The apparent insider attack, which took place in Nangarhar province, occurred after a combined US and Afghan force was returning from a "key-leader engagement," Colonel Sonny Leggett, a spokesman for US forces in Afghanistan, said in a statement.