US Secretary of State Antony Blinken and Defense Secretary Lloyd Austin traveled to Kyiv on Sunday where they met with Ukrainian President Volodymyr Zelensky and other Ukrainian officials, making them the highest-level US officials to have traveled to the country since the Russian invasion began in late February.

(SOURCE) https://www.cnn.com/2022/04/25/politics/blinken-austin-kyiv-ukraine-zelensky-meeting/index.html