>> shepard: we're getting new information tonight about an attack that killed three united states soldiers in pakistan. and it's raising troubling questions about who may have been in on it. the initial reports describe yesterday's incident outside a girls school in the northwest of pakistan as a roadside bombing. but pakistani police now say it was a suicide bomber who rammed his vehicle into a five car convoy. investigators say the attacker knew exactly which car was carrying the americans. suggesting the military may have had inside -- the militants may have had inside information. this attack generating suspicion not only american american and pakistani security forces but also every day pakistanis who want to know what united states troops were doing at the opening of a school for girls. mike emanuel is live at the pentagon for us tonight. mike, i guess well, what were they doing? >> well, shepard, their job was training a paramilitary group called the frontier corps on how to deal with insurgency, how do