a difference
When a CW is taking on a BG at any point in time, there is always the potential for bad things to happen. Obviously, the good guys are always at the disadvantage. I mean, the BG goes into the store with the intent to do ill. Good guys have to first react to the enviornment and then make assesments given the information given right?
If a guy says "I have a bomb" that's an end all statement to me because it's a weapon. There were points made about it being able to do more damage and kill more people than if it were just a gun, but thats true and not true. Whatever the mindset of the BG, property damage is the colateral effect to the BG main intent and stopping property damage should never be a reason to draw on a BG. So, in my opinion we're down to stopping the bad guys from hurting/killing good guys. If the guy were carying any kind of gun, he could achive the same thing as a bomb, but it woudl take more trigger pulls (and thus more time) to hurt the same amount of innocent people as ONE trigger pull on his bomb.
So yes, hearing "I HAVE A BOMB" is reason enough for a CW to take action.