SMYRNA, Tenn. (WKRN) — You've seen them at airports and concert venues, but now this technology is being used at high school football games.

The Smyrna Bulldogs kicked off Friday night's game with weapon detectors at the entrance.

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Rutherford County Schools became the first school district in Tennessee to install the Opengate weapons detection system at a high school athletic event. The technology, familiar to anyone who has walked into Nissan Stadium or Bridgestone Arena, is designed to spot weapons quickly while avoiding any kind of logjam in the process.

"It's mandatory to say 'Go Bulldogs' when you enter the stadium," one security staff member joked to a student about to scan through security.

The requirement was

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