The problem with them now is that the terrorists will just drive them through a crowd of people irrespective of who they are. Very difficult to guard against. It's just after the French gun atrocity the E.U. tried to implement draconian gun restrictions that applied to all members (us included; we are not out yet). Most were vetoed as being stupid but there is always a spin off. There is a lot of anti-terrorist experience here in the U.K. and very little gets through to succeed. Lagopus.....