so this latest round of heavy fighting coming as the pentagon says there are signs ukrainian forces are going on the offensive in some areas trying to take back territory captured by russian troops. a spokesman for the kremlin admitting tonight that vladimir putin has not achieved the goals he set for his forces here in ukraine and refusing to rule out the use of nuclear weapons in russia if russia faces -- excuse me, nuclear weapons if russia faces what he calls an existential threat to its domestic security. watch this. >> you can read all the reasons for nuclear arms to be used. so if it is an existenal threat for our country then it can be used in accordance with our concept. >> also, president biden leaves for brussels tomorrow. on thursday he's going to attend nato's emergency meeting on russia's invasion of ukraine. you see here sitting next to me