nora volkow, who is the director of nida says they are not standing in the way. government institute that approves marijuana research. >> if you would come up with a grant that says, okay, this is going to be a treatment for drug addiction, then go to us, but if it's cancer, it goes to the cancer institute. if it is schizophrenia, it goes to imh, the institutes have a mission with certain diseases. >> what is clear, there are bureaucratic hoops that most researchers simply don't want to jump through. neuroscientist carl hart. >> there are not many people studying marijuana. it's very difficult to get approved to study marijuana. >> what's nice about israel is that the government is helping the research to happen. >> and it's research that could give hope to patients like charlotte figge. scientists in israel are learning that marijuana use might actually protect the brain, not damage it. >> they've been able to show that it can decrease the amount of brain damage from head injuries in mice. >> right. to be able to give a medicine after the injury to reverse some