US President Joe Biden (L) walks with Ukrainian President Volodymyr Zelensky (C) in front of St. Michael's Golden-Domed Cathedral during an unannounced visit, in Kyiv, on February 20, 2023. - US President Joe Biden promised increased arms deliveries for Ukraine during a surprise visit to Kyiv on February 20, 2023, in which he also vowed Washington's "unflagging commitment" in defending Ukraine's territorial integrity. (Photo by Evan Vucci / POOL / AFP) (Photo by EVAN VUCCI/POOL/AFP via Getty Images)
