Finland's NATO membership irks Russia as alliance expands.

Finland officially joins NATO, becoming the first non-aligned country to do so following Russia's invasion of Ukraine. The move will extend the alliance's reach to the Arctic frontier and double its land border with Russia. Meanwhile, Ukrainian President Zelensky is set to visit Poland, which has announced plans to deliver fighter jets to Ukraine. Russian authorities have detained a woman in connection with the weekend café explosion that killed pro-war blogger Maxim Fomin. The Biden administration is preparing another arms package for Ukraine, and Russia has built dozens of trenches in Crimea ahead of an anticipated spring offensive by Ukraine.