‘The Science Is There’: A Former Green Beret On How Cannabis Can Help Veterans With PTSD Posted byJavier Hasse, Alex Oleinic and Nina Zdinjak December 10, 2019 Leave a comment on ‘The Science Is There’: A Former Green Beret On How Cannabis Can Help Veterans With PTSD Adam Smith, a former member of the U.S. Army Special Forces, speaks on the effectiveness of cannabis products to overcome depression and anxiety related to his time in service.