John Lott has a study of press-reported defensive gun uses. (In my experience, defensive uses are very rarely reported in the press). I especially like this story:

“Young yelled at the deputies and then fired on them. The first deputy was hit in the head and dropped to the ground.

The second deputy stepped forward and returned fire in an effort to protect the deputy who had already been shot…

Police said that was when good Samaritans armed with their own weapons stepped forward and fired multiple shots in the direction of Young to provide cover for and protect the wounded deputies, the Bellingham Herald reported.

The good Samaritans told KING that they were military veterans and they weren’t going to sit still and watch law enforcement officers be murdered so they took their children inside their homes and came back out with their own guns…

The sheriff wrote that … “Second, we are extraordinarily blessed that several armed citizens came to the deputies’ assistance at the critical moments when they were most vulnerable….””