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NOVA - Trapped in an Elevator

Trapped in an Elevator Trapped in an Elevator
Elevators have transformed our cities and our lives, but how safe are they?
http://video.pbs.org/widget/partnerplayer/1631361631/?player=WGBY-PBS&w=512&h=288&chapterbar=true&autoplay=false Elevators have transformed our cities and our lives, but how safe are they? /episodes/get/2440 /episode/2440 NOVA: Trapped in an Elevator /episode-player/2440
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