caption: A Netherlands Royal Air Force F-16 Fighting Falcon receives fuel from a U.S. Air Force KC-135 Stratotanker during Exercise Frisian Flag over the Netherlands, April 10, 2019. The exercise included more than 50 aircraft from six different nations for the purpose of training joint and combined air operations in a broad spectrum of scenarios. (U.S. Air Force photo by Senior Airman <PERSON>)
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