Personal anxiety, or something larger?

TEHRAN, Iran – #An Iranian soldier opened fire on his colleagues, killing three and wounding 12 of them at a military air base in south Tehran, the semi-official Mehr news agency reported on Sunday.
The report said one of the victims was an officer and the two others were regular soldiers. It added that the assailant was killed in a shootout with other soldiers.
http://www.foxnews.com/world/2017/08...port-says.html