Under Pressure, Biden Allows Ukraine to Use U.S. Weapons to Strike Inside RussiaWhite House officials said the authorization extended only to what they characterized as acts of self-defense so that Ukraine could protect Kharkiv, its second-largest city.
Source: Under Pressure, Biden Allows Ukraine to Use U.S. Weapons to Strike Inside Russia (https://www.nytimes.com/2024/05/30/us/politics/biden-ukraine-russia-weapons.html)