Ukrainian forces said Saturday they had entered Kupiansk in eastern Ukraine dislodging Russian troops from a key logistics hub in a lightning counter-offensive that has seen swathes of territory recaptured. The German foreign minister, Annalena Baerbock, meanwhile arrived in the Ukrainian capital for a surprise visit, which she said was to demonstrate Berlin's support for Ukraine in its battle against Russia. Ukrainian special forces published images on social media showing camouflage-clad officers with automatic weapons "in Kupiansk." It "was and will always be Ukrainian," their statement said. The town of some 27,000 people, that sits on a crucial supply route...