Tell that to David Dorn and his family in St. Louis. You can’t predict or determine if lives are going to harmed or ended. How do you know the woman shot was there to harm Congress members? Maybe she just wanted to talk to them? Nope. You are correct. Can’t take that chance. Open fire.
Yeah, she could have wanted to talk to them, or she could have had a suicide vest on.. You really don't take that kind of a chance.
As for the guy who shot David Dorn, he's been arrested and will spend the rest of his life in prison... as it should be.
Too bad it had to happen, but it wasn't like we listened when they took a knee.