An armoured ambulance makes sense, particularly in light of such events as the North Hollywood bank robbery, when the cops had to *borrow* an armored bank delivery truck to evacuate their and civilian wounded. And the German Grenzschutze used light armor, some with 20mm automatic cannons, back in the days when the *Iron Curtain* border was a 5 kilometer military controlled zone. I could see that application along our southern border, especially since the Mexicans routinely patrol their side with HUMVEES with .50 Browniong machineguns.
The Mexicans also operate surplussed German Bundesgrenzschutze vehicles with cannon. Yeah, I can see their use along that front.
