people who control facebook. >> yes. >> they're self controlled but they can't keep a handle on it. >> and the challenge for the governments that regulate facebook and the companies that run these sites. this is deeper than the moment when the shooting starts. it's about what this person was reading and consuming and talking about online. for the years before he decided to enter this mosque and attack people what i worry about more, why was he able to get to the point where he's reading so many crazy things on line that he felt compelled to act? that will be harder for the facebooks and youtubes to address. democratic senator kirsten gillibrand of new york makes her run official as vice president joe biden accidently, or maybe purposely, drops a big hint about his future plans.