get out of ukraine? >> reporter: well, they're underscoring what you heard in that interview between lester holt and president biden, that american forces are not going to be sent in to help evacuate americans. now, of course there was an order approved to send several thousand troops to the region to poland, in particular, to try to help u.s. citizens exit the region. but that is why they are stressing that now is the time to leave. and i think this just underscores the urgency of this entire situation, steph, and based on my conversations with senior administration officials, they are taking president putin at face value. the fact he has surrounded ukraine on several different sides, the fact he's intensified that troop buildup on the ground and also at sea. so they are bracing for the very worst. but they insist there is still a diplomatic off-ramp. that is why you are seeing this diplomacy, president biden reaching out to his foreign counterparts, president macron