NEW : ` Eikenberry was more cautious , saying that `` success is not guaranteed but it is possible . '' ` I do n't think we can finally defeat al Qaeda '' without getting bin Laden , McChrystal said . NEW : General , U.S. ambassador testify before House and Senate armed services committees . General : Protection of Afghan people and government will be critical to success . McChrystal : ` ` I do n't view July 2011 as a deadline . ''
NEW : ` ` I do n't think we can finally defeat al Qaeda '' without getting bin Laden , McChrystal said . NEW : General , U.S. ambassador testify before House and Senate armed services committees . General : Protection of Afghan people and government will be critical to success . McChrystal : ` ` I do n't view July 2011 as a deadline . ''