The United States has paved enough roads to circle the Earth over 150 times.

Vasaloppet, which is located in Sweden is the oldest, longest, and the biggest cross-country ski race in the world. Every year, 14,000 people compete in the race.

An ordinary TNT bomb involves atomic reaction, and could be called an atomic bomb. What we call an A-bomb involves nuclear reactions and should be called a nuclear bomb.

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