An Airbus A400M transport aircraft takes off during an open day at the Melsbroek Air Base in Steenokkerzeel, Belgium, May 27, 2023. Belgian Air Force's 15th Air Transport Wing and the Directorate of Air Support (DAFA) celebrate their 75th and 30th anniversary with two-day public open day activities on May 27 and 28. (Xinhua/Zheng Huansong)