“Have you ever defended yourself from a crime in your home, in your business, or in public by using a gun? Perhaps you warded off a potential attacker by simply showing a gun?40 states now allow their citizens to obtain conceal-carry permits for handguns. Some people say that’s dangerous, while others say it allows them to protect themselves.If you have a story of self-defense involving the aid of a gun and would like to tell it to 20/20, please fill out the form below. A ‘20/20′ producer may contact you.” (04/06/07)