Many trucks have distinctive lines to their cabs that many truck drivers recognize. The STYLE of truck from this composite (sans the Al Quaeda humor) sort of looks similar to a Japanese Hino diesel. That might account for the loudness of the truck mentioned in some of the news reports. Places in North America using these smaller trucks include; courier services, wholesale food delivery services, etc.
To see more pictures of Hino trucks, one can click
here to go to http://www.hinotrucksusa.com/.
I have no association with Hino trucks.