An F-16 fighter flew over western Slovakia at supersonic speed
The training flight was scheduled for 9.00 – 10.30 a.m. Before the flight, the army let it be known that it may be accompanied by a sonic boom over the territory of western Slovakia. Several people described the experience, with the Ministry of Defence being told that it could have given notice of the flight earlier. From the skies over western Slovakia on Monday morning, people could hear a noise typical of a supersonic fighter jet flight.
Source https://aktuality.sk/nad-zapadnym-slovenskom-preletela-stihacka-f-16-nadzvukovou-rychlostou/