Olaf Meixler (L), employee of cleaning company “N*ICE”, along with co-organiser Norbert Kandzorra (R), uses a high-pressure water jet to clean an old Douglas DC-4 at the Airlift Memorial at the airport in Frankfurt am Main, Germany, 21 August 2015. Airport operator Fraport AG intends to improve maintenance of the aircraft at the Airlift Memorial as well as ensure the long-term preservation of the entire monument. (Photo by Christoph Schmidt/EPA)
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