A US Airforce KC-135 tanker aircraft is being prepared for take-off by the crew at the Airbase of Kecskemet, 87 kms from Budapest, Friday, June 26, 2015. The Hungarian Defense Forces’ aerial refueling skills, the aerial refueling routine of the Gripen fighters and the preparation for the Baltic Air Policing international engagement were demonstrated at the airbase. (Sandor Ujvari/MTI via AP)

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