Julie Holland is a clinical assistant professor of psychiatry at the New York University School of Medicine. She is also the editor of “The Pot Book: A Complete Guide to Cannabis,” about the history, politics, and medical value of the well known weed. To classify cannabis as a Schedule 1 drug means it has no therapeutic value and cannot be used safely. Reclassifying it as a Schedule 2 drug would allow doctors to prescribe it and would expand the opportunities for American researchers to study its effects. – philly.com