@gano Baldwin wasn't playing with the gun. He was holding it like he was supposed to according the script, aimed at the camera.
I know you hate guns but that's quite the leap of logic to say he "pulled" the trigger as if he knew it was loaded. How else does one hold the gun?
Actors aren't remotely supposed to be armorers. Only some know their way around a gun. That's why there's supposed to be safety on the set with the armorer in charge of the gun and the actor using it as a prop.
Horrible as it was, it's not Baldwin's fault for trusting what's supposed to be a professional. At least two armorers are required to check it. A court of law saw it that way too.
All the best,
Nonoise