"Sometimes it's just that sound. The sound of the overcharged shotgun to get migrants to step back from the border," says Gen. Arkadiusz Szkutnik, commander 18. The Mechanized Division of Gen. defends Tadeusz Buk, and at the same time the commander-in-chief of the military group in Podlasie protecting the Polish-Belarusian border. The commander of the Iron Division holds in his hands 1 of the rifles in which his soldiers were armed. It demonstrates the characteristic metallic sound of the "pump" which spreads over 1 of the containers of recently placed border infrastructure. Non-penetrating missiles proved to be an effective threat in clashing with bordering migrants.