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When you test positive for thc, it's unlike other drugs in that it doesn't necessarily mean you're intoxicated at that point if time. if you have alcohol in your system, you're intoxicated and shouldn't be driving. i still think this evidence should come in because it goes to a state of mind at the time this happened. that being said, i do see the prosecution's position on this particular point. >> and dr. kobilinsky, the level of thc is very, very low. >> that's true. in fact, in a regular smoker of cannabis, you would expect a background level of 1.5. if you do not have a regular smoker, it ...

Driving. i understand the prosecution's argument, that the presence of thc is not like the presence of pcp, however, i've always said i think this evidence should come in because it goes to a state of mind at the time this happened. that being said, i do see the prosecution's position on this particular point. >> and the level of thc we're talking about was very, very low. >> that's true. in fact, in a regular smoker of canibus, you would expect a background level of 1.5 nano grams per milliliter. on the other hand, if you do not have a regular smoker, it may indicate somebody smoked earlier i...

to earle i start. and i'm zoraida sambolin. >> let's get started. the. the fallout from tropical storm beryl. it is a tropical depression. guess what, building steam again and it's expected to be a tropical storm before we know it again. the storm is dumping as much as ten inches of rain in northern florida and southern georgia. it's also knocking out power to tens of thousands of people right across that region. now beryl has its eyes on the carolinas. cnn's rob marciano has been tracking the storm from the weather center. cnn's george howell is live in georgia. i'm assuming that ...

Radiation fallout could travel across the sea, but do they need to grab a geiger counter and start testing? our dan harris did exactly that. take a look. >> reporter: across america the radiation fears are palpable. there's a run on iodide pills, geiger counters and emergency kits on amazon.com and everywhere from hawaii -- >> i don't trust what they're saying. >> reporter: -- to seattle to missouri but how worried should we be? radiation is all around us and even inside of us all the time. it's perfectly natural and safe. to illustrate the point, we got ahold of this geiger counter. as you ca...