bullet going towards that glass won't penetrate, but the force of it will create the inside glass to spall. so you've got this sprintering of glass -- splintering unless you have this on the inside to keep you safe. >> what ems have you got here? >> well, since we're talking about... laminated glass, let's go for -- let's start with maybe patterned glass. patterned glass -- almost all of it starts off as eneeled glass. these are bathroom windows which you'd expect to see, but almost always it's eneeled unless it's in a shower bath or in a hazardous location. as it is, it's going to break the same way that ordinary glass does. and you just can go right on up through the spectrum. this is quarter inch plate. >> what would that typically be used for? >> well, this has got a slight tint to it. but you would -- again, you would find this on windows, oh, a lot of windows in office buildings are -- buildings downtown on montgomery, all high rises that were -- >> is plate tempered or not tempered, typically? >> plate is not tempered, unless -- >> specifically required, okay. >> so in the old days,