A small globe of metal with a few crude instruments weighing 184 pounds, Sputnik I was not much of a satellite by later standards. But it was the planet’s first artificial satellite, and it was not America’s. Two weeks later, the Russians compounded their triumph by orbiting Sputnik II, a much larger satellite with a dog named Laika aboard. Not only did Sputnik II carry the dog, which suggested that the Soviets were thinking about putting human beings into space, the final stage of the rocket had remained attached to the satellite—which meant, incredibly and ominously, that the Soviet rocket
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