I think a lot of it has to do with your body type. Some people can get away with a Micra, photon, altoid kit, keys and wallet in their suit pockets while others can't even carry their car keys in their pant pocket without looking like a schlemiel. <br><br>I fall into the latter catagory. Therefore I leave things in my desk, my briefcase, my car, and my overcoat/ jacket. Is this optimal? Far from it. But it is better than nothing and I was able to get back to my desk before bolting out of the building on 9/11.<br>As for carrying multiple knives... I wouldn't carry anything you would be embarrassed about showing the security guards or police (Uh, yes sir, I use this to open my mail...)