washington u.s. senators question state department officials closely thursday corruption afghanistan say failure address could cause rethink billions dollars unite state spend year know political unite state continue support afghans light go say democratic senator robert menendez senior member senate foreign relations committee menendez describe someone supportive u.s. afghanistan policy say would totally different view government kabul act wednesday special inspector general afghanistan reconstruction sigar issue report strongly criticize washington pour billions dollars afghanistan little oversight fuel corruption undermine u.s. mission unite state spend billion per year afghanistan billion defense national security another billion civilian assistance plus billions cost thousands troop military contractors richard olson state department special representative afghanistan pakistan agree corruption undermine governance call afghan president ashraf ghani commit partner fight corruption ghani olson say take step include address kabul bank scandal cancel fuel contract set monitor evaluation committee experts anti-corruption dramatically different situation prior 2014 olson testify u.s. lawmakers say afghanistan corruption threaten future spend