Russia on Thursday restored critical gas supplies to Europe through Germany via the Nord Stream pipeline after 10 days of maintenance, but uncertainty lingered over whether the Kremlin would still trigger an energy crisis on the continent this winter. “It’s working,” a Nord Stream spokesman said, without specifying the amount of gas being delivered. Germany, which is heavily dependent on Russian gas, had feared that Moscow would not reopen the pipeline after the scheduled work and accused Russia of using energy as a “weapon”. The showdown came amid the worst tensions in several years over Russ…