expansion of nato in the eastern direction. president biden said no. president biden made that point crystal clear to president putin today, that the issue of who joins nato is an issue for nato to decide. reporter: testifying on capitol hill, undersecretary of state victoria nuland warped the ukrainians themselves might rise up if russia attacks. i think the russians will have a very big fire department on their hands, that there will be severe casualties for them. reporter: what was putin s demeanor over the course of the two hours? did he signal any willingness to back down. would say his demeanor, like president biden s demeanor, was direct and straightforward. and president putin was deeply engaged and i m going to leave it at that in terms of trying to characterize where he is. reporter: among the other threats president biden made today, he said the u.s. might send more troops to eastern europe, and he told putin that