Ukraine is now closer to NATO membership than ever before. This demonstrates a strategic mistake of the Kremlin’s leader, Vladimir Putin, which he made by invading the country, says NATO Secretary General Jens Stoltenberg at Sweden’s flag-raising ceremony near the Alliance headquarters. “Ukraine will become a NATO ally. The question is not ‘if,’ but ‘when,'” he said. According to the NATO Secretary General, Ukraine is now closer to membership than ever before, and this also demonstrates a big strategic mistake made by Russian President Vladimir Putin when he invaded Ukraine. “Because, as you r…