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MADRID, SPAIN - OCTOBER 14: In this Photo Illustration a smart phone displays a picture with the logo of the news taxi app 'Uber' near the Cuatro Torres 'Four Towers' business area on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo Illustration by Pablo Blazquez Dominguez/Getty Images)

MADRID, SPAIN - OCTOBER 14:  In this Photo Illustration a smart phone displays a picture with the logo of the news taxi app 'Uber' near the Cuatro Torres 'Four Towers' business area on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world.  (Photo Illustration by Pablo Blazquez Dominguez/Getty Images)