Western countries must be ready for long-term support for Ukraine, and Poland intends to do so in the future. Jacek Siewiera, head of Poland's National Security Bureau (BBN), said this during the Warsaw Security Forum, according to an Ukrinform correspondent. "First of all, we must support the Ukrainians until their victory, as they see it," Siewiera said. According to him, Russian aggression against Ukraine is entering a "new phase of a protracted war of attrition." After one-and-a-half years of intense fighting, the war is far from over. Siewiera said that Russia had not achieved its strategic goals, but is determined…