There is nothing in an official capacity in the U.S., but four years ago, the State of Colorado approved a bit over $2 million for a study of veterans and PTSD, using various cannabis profile plants. That study has completed most of its data-gathering.
We don't have enough information. Actually, I have very little that I can quote, but there is a study that is about to be completed on the treatment of PTSD with cannabis in the U.S. It's not official, however. This is one that we paid for from the state with state funds, but it is not a U.S. government-sanctioned study.
Israel is doing studies on the use of cannabis in veterans. One study in particular looked at therapeutic horseback riding, interestingly, with great benefit. They found that service members, veterans, who were engaged in horseback riding under a specific program and using cannabis were much more effectively combatting PTSD than those who were doing one or the other. The administrator of that program said that she had treated about 60 veterans as part of it and there had been no suicides, which is remarkable. Suicide is unfortunately the primary cause of death among Israeli soldiers.