French cab drivers block roads outside Charles de Gaulle airport during a protest against Uber Technologies Inc.&#39;s car sharing service in Roissy, France, on Thursday, June 25, 2015. French taxi drivers are on indefinite nationwide strike as they demand a government crackdown on what they say is Uber&#39;s use of unlicensed chauffeurs for its UberPop service. Photographer Balint Porneczi/Bloomberg via Getty Images