US official says Russian forces are ‘frustrated’ that they haven’t taken any cities in Ukraine due to ‘a very determined resistance’ February 26, 2022 Source: US official says Russian forces are ‘frustrated’ that they haven’t taken any cities in Ukraine due to ‘a very determined resistance’ Updated: February 26, 2022 at 6:18 pm Tags: Ukraine, US ◀ What is NATO, and how has it responded to Russia’s invasion of Ukraine? Ukrainian fighters battle for Kyiv ▶
