When the horrible shooting in Tuscon happened, an armed citizen, Joe Zamudio, was next door in Walgreens. Here is the story in his words:
Note that without special military or police training, he was able to rapidly assess the situation and took the appropriate action. Even though he was momentarily confused about who the real shooter was, he didn't shoot the wrong person; in fact, he didn't even draw. Mr. Zamudio is a true American hero. He proves that an average citizen, carrying a concealed weapon, can make the right decision and make a difference within precious seconds, even though the police are only minutes away.