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>> reporter: i traveled to virginia commonwealth university in richmond to meet this rese e researcher who's investigating vaping during this cbd craze. >> if it happens to be tainted you're increasing a rapid response of whatever it's adulterated with, which is some of the concern here. >> sanjay gupta is with us now. a lot of consumers will be surprised to find out cbd is not always safe. >> the issue, cbd itself, pure cbd is safe. it can be a medicine, it's nonpsycho active. the problem, it's a totally or wholly unregulated industry, which means when you buy a product you don't have any gua...

Will be able to recover, will be able to make it through this tragedy. right now, we are aware of five of those injured in the shooting that are in critical condition at this point. another ten that were transported are said to have nonlife threatening injuries. some of them have been discharged, though we haven't been able to get information confirmation on that yet. what we have learned is they are still hospitalized, some of them, and hopefully at 10:30 there will be a surgeon joining the sheriff's department in a press conference and we will be learning more about who these injured victims...

Experience in vietnam. listen to this. >> you misrepresented his comments. his comments were misrepresented. >> he goes on to talk about blumenthal. blumenthal did serve six years in the u.s. marine corps rese e reserves but never served in vietnam as he earlier had said in 2010 when running for the senate. he apologized for that. >> i think he chose the word misrepresent which was interesting. misrepresenting the context with those two adjectives were correct? you have all these people in both parties vouching that for senator blumenthal that gorsuch used the same words with senators in the o...

Investigating this as an act of terror. >> the fbi says they have good reason to do so. now we have details on what the reasons are. one, this facebook posting, a pledge of allegiance to the isis leader by the wife. tashfeen as this attack was under way. significant in its own right because we know there's prese e precedence for this. the male suspect had contact with known suspects. that's been shown in the past as a path not only to radicalization but those contacts have proceeded people who have chosen to go carry out acts of terror. the final reason is the most obvious, the enormous arsena...

candidates. but this weekend's presidential debate focusing on national security. i moderated the debate here in washington, d.c. and among the many note worthy exchanges was this one in which newt gingrich, a front-runner right now, advocated what many conservatives clearly don't like, amnesty. >> i think that we ought to have a visa that goes with every graduate degree in math, science, and everything nearing so that people stay here. five blocks down the street you'll see a statue of einstein. einstein came here as an immigrant. so let's be clear how much the united states has dra...