Double Naught Spy
Sus Venator
The whole building is downrange; it's a free fire zone. I wouldn't want to be standing up on the catwalk unless I was sure the guy flinging lead sees me.
Obviously, that was the problem. The shooter saw the guy on the catwalk, ascertained that he was a target, and shot him!
If that's the case, why can't they have a glass ceiling? I am having trouble visualising a 360 degree range where there can't be glass between the trainee and the observer.
If you are going to have people on the catwalk on a 360 degree range with live fire of real ammunition, the "glass" ceiling sounds like a good idea. The problem is that it would quickly become speckled from splatter and/or errant rounds and eventually lose its transparency. Then you have a very expensive skylight. As noted, it would be very expensive.