Membership in NATO is the only 'credible' security guarantee Ukraine can receive against any future Russian aggression, Finland's top diplomat said on Jan. 8, 2025. Ukraine's leaders have aggressively pushed for an invitation to the 32-member alliance but have met resistance from several key members as the war lurches toward its three-year mark and Ukrainian troops struggle to hold back Russian advances. Finland, which shares a 830-mile border with Russia, joined the alliance in 2023 after the Kremlin's full-scale invasion of its smaller neighbor.
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