first the latest on the the investigation from drew griffin and jake tappert. you have more information. but what can you tell us? >> well, anderson, we told you last night that according to u.s. official, the initial investigations and interviews they were doing with joe scar tsarnaev says they acted alone and they were motivated ed by e jihadist thoughts. the idea that islam is under attack and they needed to fight back. iraq and afghanistan being examples of that perception. again, this is just what dzhokhar is saying. it's not as if anyone is taking his word for it. they are going to investigate more of what they were saying. in addition, anderson, we also told you that dzhokhar and his brother were self radicalized according to dzhokhar, that they watched youtube videos on the internet and that's how they became radicalized. one thing the government official is telling it seems to me is the videos are from anwar al awlaki, they are likely, likely, the official says, to have been part of this video radicalization. anderson? >> jake, preernt that updatapprt