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Smoke from flares fills the air as employees from the Air France division of Air France-KLM Group gather during a protest by union members representing airline pilots, cabin crew and ground staff, in Paris, France, on Thursday, Oct. 22, 2015. The demonstrations have been called in protest at the arrest of five employees police suspect may have been involved in the clashes with management, with labor groups arguing that the men were treated like 'terrorists.' Photographer: Christophe Morin/Bloomberg via Getty Images

Smoke from flares fills the air as employees from the Air France division of Air France-KLM Group gather during a protest by union members representing airline pilots, cabin crew and ground staff, in Paris, France, on Thursday, Oct. 22, 2015. The demonstrations have been called in protest at the arrest of five employees police suspect may have been involved in the clashes with management, with labor groups arguing that the men were treated like 'terrorists.' Photographer: Christophe Morin/Bloomberg via Getty Images