repeating tonight that the bestr ukraine to drop its aims to join nato and international recognition that crimea is part of russia. ukrianians agree that the russian invasion is already under way. with the russian parliament giving putin the green light to use military force outside the country, the fighting in the east could trigger a full-scale invasion. the mood in the capital is more subdued than normal tonight. >> all the people around me, they're worried. they are, like, "oh, my god. we're going to die, "or something. but i'm okay. >> reporter: tonight, ukrianians are staring down the barrel of a gun and the only hope they have is that new sanctions will stop vladimir putin from pulling the trigger, a strategy that has not worked so far. norah. >> o'donnell: charlie d'agata, well said. thank you. well, we go now to the front lines in eastern ukraine, where