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Yawn for a free coffee and other ways advertisers are getting smart at airports

By Daisy Carrington, for CNN • Updated 2nd October 2013
Douwe Egberts marketing campaign used 'yawn recognition' technology.
Heineken's 'Change of Plans' campaign at JFK airport
Heineken's 'Change of Plans' campaign at JFK airport
Wieden + Kennedy
Yawning for a coffee in OR Tambo gained plenty of social buzz.
Yawning for a coffee in OR Tambo gained plenty of social buzz.
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