On December 13, a delegation from the USA arrived in Kyiv. Their visit coincided with a massive attack by Russia on Ukraine.
This was reported by Twitter (X) of the U.S. Ambassador to Ukraine Bridget Brink.
"Glad to welcome in Kyiv during the air raid the Ambassador at Large for Cyberspace and Digital Policy Nate Fick and Doug Beck, Director of the Defense Innovation Unit," she noted.
Brink stated that they will meet with representatives of Ukraine’s defence-tech sector "to discuss lessons learned on the battlefield and opportunities for future collaboration with the USA."