I had touched on the subject of these devices here , and posted some details of French launchers of the same era here . The Austro-Hungarian empire was heavily involved with such mortars, they are detailed on this fine (German language) page . Having had the opportunity to look at surviving example...

I must've heard of about 5 separate incidents from North America starting with Elliot Rogers. There was Elliot himself, the Canadian guy, the college shooting, the Las Vegas shooting, and now a school shooting in Oregon. Meh. As usual, the focus will be on the availability of firearms and not menta...