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After more than a month of traveling over land and sea, a huge doughnut-shaped electromagnet has crossed the finish line of its 3,200-mile (5,000 kilometers) haul from New York to Illinois.
After more than a month of traveling over land and sea, a huge doughnut-shaped electromagnet has crossed the finish line of its 3,200-mile (5,000 kilometers) haul from New York to Illinois.
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