neck-in-neck with his top gop rivals. james carville and david are standing by. we ll talk about that. i m wolf blitzer and you re in the situation room. a new wave of fury may be about to explode in afghanistan after a u.s. soldier allegedly walked out of his base and went on a house to house shooting rampage. 16 civilians are dead, nine of them children. military authorities say the soldier acted alone and turned himself in. vowing revenge for the killings, a statement from the taliban calls u.s. forces and i m quoting, sick-minded american savages. u.s. officials are voicing deep sorrow. let me say that like many americans, i was shocked and saddened by the killings of innocent afghan villagers this weekend. we send our condolences to family who have lost their loved ones and to the people of afghanistan. this is not who we are. and the united states is committed to seeing that those responsible are held accountable. let s go straight to kabul with sara sidner stan