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A 1956 law planned 41,000 miles of interstate

The National Interstate and Defense Highways Act of 1956 expanded the planned interstate system to 41,000 miles.

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To build the network, $25 billion was authorized for fiscal years 1957 through 1969.

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John Glenn orbited Earth at 17,500 mph

On February 20, 1962, John Glenn became the first American to orbit Earth, traveling at 17,500 miles per hour.

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The Great Wall is a network, not one wall

The Great Wall of China is a system of fortifications built and rebuilt across different regions and dynasties.

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Art was once an Olympic competition

The modern Olympic Games awarded medals for works inspired by sport from 1912 through 1948.

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