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On This Day | September 15

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1975
Santiago Metro opened

The Santiago Metro is a rapid transit system serving the city of Santiago, the capital of Chile. It currently consists of seven lines (numbered 1-6 and 4A), 136 stations, and 140 kilometres (87.0 mi) of revenue route. It is the first and only rapid transit system in the country. The Santiago Metro carries around 2.5 million passengers daily.

1926
Hartsfield-Jackson Atlanta International Airport opened

Hartsfield-Jackson Atlanta International Airport, also known as Atlanta Hartsfield-Jackson International Airport, Hartsfield-Jackson International Airport, Atlanta Airport, Hartsfield-Jackson, and formerly as the Atlanta Municipal Airport, is the primary international airport serving Atlanta, Georgia, United States. ATL covers 4,700 acres (1,900 ha) of land and has five parallel runways.

1901
Donald Bailey was born

Sir Donald Coleman Bailey was an English civil engineer who invented the Bailey bridge. Field Marshal Montgomery is recorded as saying that "without the Bailey bridge, we should not have won the war."

1861
Sir Mokshagundam Visvesvaraya was born

Sir Mokshagundam Visvesvaraya was an Indian civil engineer, administrator, and statesman, known as the "Father of Indian civil engineering". Visvesvaraya is regarded in India as one of the foremost civil engineers whose birthday, 15 September, is celebrated every year as Engineer's Day in India, Sri Lanka, and Tanzania.

1859
Isambard Kingdom Brunel died

English civil engineer and mechanical engineer Isambard Kingdom Brunel died aged 53. He is considered "one of the most ingenious and prolific figures in engineering history" and "one of the greatest figures of the Industrial Revolution, who changed the face of the English landscape with his groundbreaking designs and ingenious constructions". Among many other projects, he was involved in the building of the first tunnel under a navigable river (the River Thames) and the development of the SS Great Britain, the first propeller-driven, ocean-going iron ship.

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