• Fifteen high school students dead, including the two student gunmen - Columbine, Colo., April 1999.
• Thirty-two victims shot dead at Virginia Polytechnic Institute and State University - Blacksburg, Va., April 2007.
• Twenty-six killed at Sandy Hook Elementary School, including 20 children - Newtown, Conn., December.

These acts, which are becoming notoriously more familiar, leave many with mouths agape wondering not only why they happened but what can be done to take back schools.

The most recent shooting at a Connecticut elementary school re-awoke a nation questioning whether guns on campus, be it with staff or armed guards, would help stop another deadly situation from happening.

This heated gun-use discussion has proponents and opponents alike. Each, they say, is looking out for one commonality -- the children.

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PRO: Weapons save lives, stop violence before it starts

CON: Too soon to tell if guns on campus would deter future shootings