This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
airports united airportsunited airport workers airportworkers airport transport workers transportworkers trade union tradeunion fnv luchthavenmedewerkers amsterdam schiphol schiphol airport schipholairport people outdoor AirportWorkers from FNV union display banner. AirportWorkers from FNV union display banner.