energy grid. marcus moore in ukraine for us. reporter: tonight, ukraine launching unprecedented drone attacks on russia air bases deep inside russia. video circulating online show a massive explosion lighting up the sky near one air base. seconds later, the blast. a senior aide to president zelenskyy confirming to abc news ukrainian drones hit two bases 300 miles across the border. the strikes targeting something long thought untouchable, damaging two long-range, nuclear-capable bombers. the ukrainians posting these images. the bombers seen here, lined up sunday. ukraine claiming the bases are staging grounds for the kremlin s relentless air assaults that have devastated the country s power grid. and today, russia unleashing another deadly barrage of missiles acrkrcross ukraine. but ukraine claiming it shot down more than 60 of the 70 missiles fired. those drone attacks inside russia, the biggest blow to vladimir putin since this powerful truck bombing on the