regions. vladimir putin now says ukraine s counteroffensive has begun and says it s failing. ukraine has said it will not officially announce the operation, but a a local commander says his forces only testing russian defenses for now. fred pleitgen reports from one town fighting is hard to ignore there. reporter: aid deliveries in one of the most dangerous places in ukraine. the buffett foundation, the frontline town where the russians say ukraine s military is trying to punch through their defenses. constant art tul ri and morter barrages driving residents underground. we have to go to the basement because there s been an increase in shelling. you can certainly hear it and feel it as well. rein the basement shelter, a boxes are dlifred to elderly residents, many traumatized, but resilient. it s very dangerous here, but i