. >> benzodiazepine valium. that as normal. >> i only took two. >> why did you take any? >> i don't know but i only took two. >> i don't apologize to brown and he didn't think i was going to get outside charges. >> so tell me what happened. >> i told him to -- a girl gave them to me. >> did you ask her for them did you just take them. >> did you know what they were? >> no. not really. i thought they wasn't valium. >> but you put them in your mouth anyway? >> yeah. >> why? >> because i'm an addict. >> why are you upset you told me the other day. i don't want to get charged outside charges. >> what do you want me to do? what do i tell you all about these drugs up here? >> i've never seen drugs up here. that was the first time. >> so the first time you wanted to be a participant in it you just stuck it in your mouth. what if you were allergic to it. what if you keeled over and died. >> i'm sorry. i did it. i don't know what else to say. >> you're going to get disciplinary and i'll think about the charges. >> please don't -- >> don't beg, don't. >> please don't keep me from g

that can give a strong indication if a drug is going to be impairing, benzodiazepine, often used foreep or anxiety, those generally cause a great deal of sleepiness. then up to the right there's epidemiological evidence so there is evidence that drugs that can make people sleepy do increase the risk of traffic accidents, and then down at the bottom is this focus on standardized studies, taking a look at neuropsychological tests, measuring alertness and arousal, kind of going through actually all the important brain functions, the brain functions are important for driving certainly arousal, sleepiness is very important but it would even go on to things like executive function and in the setting of studies for drugs, again, we can ask drug developers to enroll patients or healthy volunteers and do randomized placebo-controlled trials have positive controls, and get a really good idea of skills important for driving like being able to stay within the lane of the highway. so at this point, we were i think changing to a more sophisticated analysis of drugs. previously we were collecting o