washington president barack obama call afghanistan security situation precarious say wednesday keep u.s. troop level 8,400 end administration rather reduce 5,500 year end previously plan obama statement white house say role u.s. force afghanistan remain unchanged train advise afghan police troop support counterterrorism missions taliban group obama presidency end january obama plan still call reduction u.s. troop level current roughly 9,800 much previously plan obama take office 2009 pledge wind u.s. war iraq afghanistan say end america combat mission afghanistan acknowledge security concern persist security situation afghanistan remain precarious obama say taliban remain threat gain grind place taliban force hold territory afghanistan time since 2001 u.s.-led invasion accord recent unite nations estimate islamic state group also establish small presence afghanistan obama decision come review submit last month u.s. commander afghanistan army general john nicholson draw criticism inside outside administration pentagon officials say nothing address deteriorate security situation afghanistan disappoint administration think troop number substitute comprehensive strategy say u.s. defense official speak condition anonymity neither reduction white house seem want current number seem sufficient deal security problem mac thornberry republican chairman house representatives arm service committee criticize say new cap u.s. troop level time president level american people really take achieve goals afghanistan much cost thornberry say statement obama speak advance nato summit friday saturday warsaw poland alliance members expect confirm support kabul government addition u.s. force 3,000 international troop afghanistan u.s. troop afghanistan since 2001 invasion launch obama predecessor george w. bush topple taliban leaders harbor al qaeda organization responsible sept. 11 attack unite state kill 3,000 people america long war announcement white house obama flank defense secretary ash carter top u.s. military officer general joe dunford chairman joint chiefs staff obama shift say keep 8,400 u.s. troop afghanistan 2017