New op-ed in the New York Daily News: Concealed weapons save lives, The evidence is clear: Massacres are stopped by legally armed citizens

My newest piece there starts this way:

Friday’s horrible shooting in Colorado occurred in yet another place where guns are banned. And that’s consistent with a trend: With a single exception, every multiple-victim public shooting in the U.S. in which more than three people have been killed since at least 1950 has taken place where citizens are not allowed to carry their own firearms.

The Cinemark movie theater in Aurora, like others run by the chain around the country, displayed warning signs that it was illegal to carry guns into the theater.

This applied to all nonlaw enforcement personnel, including individuals with concealed handgun permits. In other words, despite more than 4% of the adult population of Colorado having concealed handgun permits, a gunman intent on killing a lot of people could be confident that law-abiding citizens there would be sitting ducks.

If one of the hundreds of people at the theater had a concealed handgun, . . .

Mayor Bloomberg has a competing piece also on guns in the same newspaper and his is "Gun Control Cannot Wait."