People suffering from post-traumatic distress disorder report that cannabis reduces the severity of their symptoms by more than half, at least in the short term, according to a recent study.
That study has tenure-portfolio publishing/activity written all over it...it's always a little maddening, though - whoever is writing the headlines for Science Daily needs to perhaps learn how to be a little more specific.
The results of the study were mostly inconclusive, but an interesting data set. (I suspect that was the real point of it....)