On September 25, 2015, the Institutional Review Board (IRB) at Johns Hopkins University approved the protocol design for our upcoming study of smoked marijuana for symptoms of PTSD in 76 U.S. military veterans. The IRB will issue final approval for the study after the U.S. Drug Enforcement Administration (DEA) grants the Schedule I license for the study site in Phoenix, Ariz., and the study is listed on clinicaltrials.gov. The DEA will review the Phoenix study site when construction of the site is complete, and has already approved the specific refrigeration and security systems that we will use to store the study marijuana at the Phoenix site. The Principal Investigator (PI) for this study is Marcel Bonn-Miller, Ph.D., of the University of Pennsylvania. The Johns Hopkins study site is led by Site PI Ryan Vandrey, Ph.D., and the Phoenix site by Site PI Sue Sisley, M.D.