troops on a very, very volatile flashpoint border. and somewhere in zelensky's mind has got to be the truth of the matter, if talks between the united states and russia break down on january the 10th and the united states decides to impose sanctions on russia and russia suddenly feels it has nothing to lose and decides it's going tiny to invade ukraine, the ukrainians will pretty much be on their own. because nato and the u.s. have said that they have no appetite to put troops on the ground and get involved in a war with russia. and it's going to be very hard for the ukrainians to defend themselves without the help of any other military force on the ground with them against the full might of the russian army. >> you mentioned european security. you're in london. what do the brits, the french, the germans make of biden's approach to putin and russia? do they think he's doing enough?