<Anchor>
Although the West, including the US, welcomed Russia's insistence on withdrawing its troops, they responded that it was necessary to verify that the withdrawal was actually done.
U.S. President Biden has repeatedly emphasized that the threat remains and a decisive response.
Correspondent Yunsu Kim from Washington.
<Reporter>
U.S. President Biden gave an explanation to the public a day before the expected date of a Russian invasion.
President Biden first stressed that he was engaged in an uninterrupted diplomatic war.
He welcomed the request to withdraw Russian troops, but responded cautiously.
[Biden/President of the United States: The Russian Defense Minister has announced that some troops have withdrawn from around Ukraine, which is good news.
However, we have not yet verified whether it is true.]
There are still about 150,000 Russian troops deployed around Ukraine, so they have not lifted their vigilance, saying that the threat is still there.
President Biden said he did not want a confrontation with Russia, but raised the level of response that he would mobilize all U.S. forces to fight the invasion if the invasion became a reality.
[Biden/President of the United States: The United States will defend the territories of NATO members with all its might.
An attack on a NATO member is an attack on the United States.]
Earlier, the foreign ministers of the United States and Russia announced on the phone that they had agreed to continue discussions on security measures in writing.