NATO Secretary-General Jens Stoltenberg said that he was “deeply saddened and disturbed” by reports of the death of Russian opposition leader Alexei Navalny. “We need to establish all the facts, and Russia needs to answer all the serious questions about the circumstances of his death,” said Stoltenberg. “Navalny has been a strong voice for freedom & democracy; NATO & Allies had long called for his release. My thoughts are with his family & loved ones.” Russian media reported on Feb. 16 that Russian opposition leader Navalny died in prison. Navalny was being held in a penal colony in Russia’s f…