A Russian scientific spacecraft whizzing out of control around the Earth, and expected to re-enter the atmosphere on Saturday, may have failed because it was struck by some type of antisatellite weapon, the director of Russia’s space agency said in an interview published Tuesday. He did not say who would want to interfere with the spacecraft, which was intended to explore a moon of Mars. The Russian craft, named Phobos-Grunt for the moon and the Russian word for ground, ran into trouble soon after it was launched in November, when its rockets failed to lift it out of low Earth...