Dear Honorable Jeff Sessions, I feel obligated to share the results of my five-year-long investigation into the medical benefits of the cannabis plant. Before I started this worldwide, in-depth investigation, I was not particularly impressed by the results of medical marijuana research, but a few years later, as I started to dedicate time with patients and scientists in various countries, I came to a different conclusion. Not only can cannabis work for a variety of conditions such as epilepsy, multiple sclerosis and pain, sometimes, it is the only thing that works. I changed my mind, and I am certain you...