(KHARKIV REGION, UKRAINE) – Ukrainian leader Volodymyr Zelenskyy has visited the front line near Kupyansk, where he told troops that progress on the battlefield is essential for strengthening Ukraine’s position in international diplomacy as the country continues to resist Russia’s invasion. Zelenskyy travelled to the Kupyansk area on Thursday, meeting soldiers engaged in operations to push back Russian forces. He said the situation in this part of the Kharkiv region remains critical, and that tangible results on the front are…