When the President of Ukraine invited CBS News to visit to the front line in his country’s war against Russian-backed separatists, we expected a quick trip in an armored motorcade to the muddy trenches that cut a bloody scar through the wheat fields of eastern Ukraine. We did not anticipate an informal breakfast — lard on rye bread, salmon sashimi, homemade cookies and shots of brandy — with President Volodymyr Zelensky and his elderly parents in their tiny, Soviet-era kitchen.