After then checking in as normal at the same kiosk, passengers can pass through a miSense automatic security gate by placing their finger on a scanner and inserting their boarding card into the reader.

CNN: Heathrow tests biometrics

So a camera watching a gate through which only a dozen people pass each day would appear to be a much busier gate, with a dozen people using it in a few seconds.

ECONOMIST: Monitor

There was much more at stake for them than there had been for the Groton grads of an earlier day. (How many hours do you think they put in doing homework?) College was a gate through which, once, only the favored could pass.

NEWYORKER: Live and Learn