You are alone with Bin Laden and Saddam. You have a gun, fully loaded. They do not.
A) You can shoot them, kill them, and there is nothing they can do about it. The government will thank you, and you will not be charged with any criminal crime. The world is a safer place. Hell, you might even be a hero.
B) You can sit and have a nice chat. We will even throw in a cup of tea, and you can talk some sense into them. Maybe they are just misunderstood, after all. One big happy family. (Hopefully they don't grab the gun from you while you pour the tea.) Surely things can be resolved and we can all get along.
Which do you do? Consider this a real opportunity. If you really had the chance?
Me? Line them up!! They would be goin down!!