In reaction to a 1988 shooting in California, Congress passed the Gun-Free School Zones Act of 1990. Subsequently that law was declared unconstitutional on technical grounds and it was strengthened and expanded in 1995. The law prohibited any law-abiding citizen from possessing a gun on or near schools.
In effect, the law provided a "zone of defenseless victims" for malcontents, terrorists and crazies. These villains knew no one would be available to stop their desired mayhem. A review of the school shootings since 1991 supports this observation.
A friend claims the liberals in Congress pushed this legislation knowing it would lead to carnage and the subsequent public outrage would allow the liberals to expand their agenda of gun control. That claim seems unlikely until one examines the gun control bill introduces by California Sen. Dianne Feinstein.
It is imperative that the zone of defenseless victims be eliminated. From a practical sense, the most logical solution would be to allow those teachers, administrators, maintenance staff and others who qualify for concealed weapons permits to carry or have available weapons to stop the villains. In this fashion, those who would commit atrocities such as we've seen would not know who could kill them after the first shot. They would leave the schools and children alone.