U.S. officials are moving at “Formula One speed” to upgrade the Ukrainian military and prepare international sanctions against a looming Russian invasion as weeks of “high diplomacy” approach a potentially violent outcome.

“The speed and the dynamic of our relations between Ukraine and the United States, which was started by our presidents, President Zelensky and President Biden, actually was towards Formula One speed,” Ukrainian Foreign Minister Dmytro Kuleba said Wednesday in a press conference alongside Secretary of State Antony Blinken. “And we know that the United States stand with us not only in the area of security, but also in supporting our internal strength, and for that, I am very grateful.”