Officials at Skyline High School in Longmont, Colo., are about to employ a new tool in their effort to keep their students safe: a sophisticated weapon-scanning technology originally developed for military use.

The high-tech security system, initially designed to track enemy submarines, will be installed at each of the school's entrances to scan for weapons as students enter the building. The system's creators say it is superior to the metal detectors used in most schools and airports today because it eliminates the "false positives" these traditional systems often generate.

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