 You're in Secret Service. You have permission. You see a guy with a gun pointed at the president. Shoot him before he shoots. Right. Where law enforcement would need the permission to shoot unless he shot first. Would they not? That's exactly right. The Secret Service is a different mindset than other law enforcement. Basically, when you they don't manage a situation with a firearm. If you see a Secret Service with a firearm, it typically means someone's getting shot. Law enforcement is completely different.