>> the use of marijuana is detrimental. >> marijuana is not a healthy substance. >> if i were sick i wouldn't suggest you take marijuana to cure yourself. >> attorney general jeff sessions, who declined to be interviewed for this documentary, has made it crystal clear, he sees no good to come out of marijuana. including cannabis's role in the opioid crisis. >> i'm astonished to hear people suggest we can solve our heroin, crisis, have you heard this, by having more marijuana. how stupid is that? >> this bills become so addictive. the dea said a huge percentage of heroin addiction starts with prescription. we think a lot of this is starting with marijuana and other drugs. >> marijuana as a gateway drug to more dangerous, more lethal narcotics. it's a notion that has steered policy and public opinion for decades. >> leading medical researchers are coming to the conclusion