The crew on a nuclear-powered Russian military submarine prevented a “planetary catastrophe,” according to a top naval officer who spoke at the funeral for the 14 sailors who died during a fire on the vessel. Captain Sergei Pavlov, an aide to the commander of Russia’s navy, said Sunday the sailors “saved the lives of their colleagues, saved the vessel and prevented a planetary catastrophe.” Dmitry Peskov, a Kremlin spokesman, said there were no signs the incident could have caused a larger catastrophe. “As for the reactor, there are no problems with that,” he said. After days of secrecy about the...