A Russian test of Europe's counter-terrorism system? [OPINION]

Russia may have been investigating its capabilities to spark a run of panic across Europe erstwhile explosives-laden letters were intercepted in Spain at the end of 2022. US press reports say that for now Russian military intelligence has not received approval to full usage specified tools under the threshold of war for fear of global repercussions. However, it is suggested that a green light should not be ruled out if Russian troops in the course of aggression against Ukraine endure crucial losses in the future.