To enter the estate, guests must cross a salt marsh by wooden bridge, access an electronic gate and drive through a barn-turned-gatehouse.

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When a traveller enters an airport with one of these smart cards, sensors read the passenger's card and automatically send a gate number and electronic boarding pass to the passenger's smartphone.

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Vincent Molinari is CEO, Gate Technologies, LLC, an electronic transaction platform for global private, restricted, alternative and illiquid assets.

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