A terminal is almost empty as public employees of the Frankfurt airport went on a warning strike for higher wages in Frankfurt, Germany, Thursday, March 27, 2014. Lufthansa had to cancel more than

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A terminal is almost empty as public employees of the Frankfurt airport went on a warning strike for higher wages in Frankfurt, Germany, Thursday, March 27, 2014. Lufthansa had to cancel more than 600 flights. (AP Photo/Michael Probst)

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Associated Press
Thu, Mar 27, 2014 7:12 PM EDT