and in terms of science and medical sort of -- when we think about medicine, there are always risks to taking any drug from acetaminophen, the toxicity and so forth, to marijuana to her n heroin. there are always risks that you have to think about weighing the risks versus the benefits. and in this case, colorado, washington, say, hey, the risks are too high. >> the death from prescription drugs in this country far exceed the direct deaths, at least, from anything marijuana related. yet the reason we have highly regular lated but legal prescription drugs is because we say the benefits of those prescription drugs are very high. >> absolutely. >> and to your point about pushing that frontier, you know, that this is basically uncharted territory for the states, one thing that's very important to remember is that our laws do not shape the culture. it's the culture that shapes the laws. you know, we've already seen that with same-sex marriage, i believe in the future we'll see wit immigration reform, and it's