One of the first criminals named on the FBI's Ten Most Wanted List was Willie Sutton, a man who quipped that he robbed banks because "that's where the money is." Sutton's comment could easily apply to the epidemic of school shootings that has overtaken America. Banks, airports, jewelry stores, and other locations that have been attractive targets to criminals are protected with multiple layers of security, including armed guards. Children, our most precious resource, are protected with signs proclaiming slogans like "this school is a gun-free zone," as if a maniac with a gun is going to see the sign...