"The Suwalki Gap is a potential vulnerability as Kaliningrad and Belarus – now basically a military extension of Russia – could try to cut the Baltic States off from Poland," underlines Linas Kojala, director of the Eastern Europe Studies Centre.'If Ukraine falls – we have a big problem'Despite this, there's no sign of panic in Vistytis; but for some residents, there is also no forgetting that Russia houses troops and reportedly nuclear weapons next door in Kaliningrad."We are afraid because if Ukraine falls, we have a big problem because the Russians will come to us from Kaliningrad and also from Belarus," Vilius explains.The growing number of Russian troops currently stationed over the barbed wire in Belarus could quickly cross the border if Mr Putin ever decided to attack."Now it's less because everyone went to Ukraine… but even though the number of personnel decreased around us, most of the equipment is still here and the force needed is still here.""