spring offensive. that threat follows this deadly attack in kabul but a taliban suicide bomber two hours after president obama left afghanistan and the taliban claiming it s just a sign of things to come. let s go straight to nick payton walsh in kabul. when the taliban says spring offensive, tell us exactly what that means. reporter: well, something they were talking about two weeks ago but today their statements shortly after barack obama left made it clear they consider it a new operation ahead of them. something they called al faruq, an arabic term referring between a person who can distinguish between good and evil. many targets, principally foreigners, those assisting foreigners, afghan security forces and a variety of other tactics which, of course, this kind of statement is try to design fear through the afghans working with the nato campaign here. we saw this morning a suicide bomber driving a car laden with explosives into the gates of something called the greenvi