KYIV, Ukraine — Ukrainian President Volodymyr Zelenskyy sounded another defiant note on his return to his nation’s capital Friday following his wartime visit to the United States, saying his forces are “working toward victory” even as Russia launched new strikes across the country. Moscow repeated that there would be no end to the war until its military objectives are achieved. The Ukrainian military said Russian forces fired multiple rocket launchers “more than 70 times” across Ukrainian territory