Tourism

Associated Press
FILE - In this Wednesday, Dec. 15, 2010 file photo, planes are grounded during a 24-hour strike at the Athens International Airport Eleftherios Venizelos. Greece's air traffic controllers' union called on Wednesday, April 1, 2015, for an urgent upgrade of the country's air traffic radar system and for more staff to be hired to handle the increasing number of tourists coming in. (AP Photo/Thanassis Stavrakis, File)

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