1861day.year
The first transcontinental telegraph line across the United States is completed.
Completion of the first transcontinental telegraph line links the eastern and western United States by instant communication.
Engineers finish stretching telegraph wires from Omaha to Sacramento, completing the nation’s first coast-to-coast communication network. This achievement renders the Pony Express obsolete and transforms military, political, and commercial correspondence. Messages that once took weeks now travel in minutes, shrinking the continent mentally as well as geographically. The line bolsters national unity on the eve of the Civil War. It sets a precedent for future telecommunications infrastructure projects.
1861
first transcontinental telegraph
1931day.year
The George Washington Bridge opens to public traffic over the Hudson River.
The George Washington Bridge connecting New York and New Jersey over the Hudson River opened to traffic in 1931.
Engineered by Othmar Ammann, the George Washington Bridge was constructed to alleviate congestion on ferry crossings.
On October 24, 1931, the suspension bridge opened to vehicles, linking Manhattan to Fort Lee, New Jersey.
At its completion, it was the longest main span suspension bridge in the world at 3,500 feet.
The bridge's design featured distinctive steel towers and a two-level roadway added in 1962.
Today it remains one of the busiest bridges globally, carrying nearly 100 million vehicles annually.
1931
George Washington Bridge
2003day.year
Concorde makes its last commercial flight.
In 2003, the Concorde supersonic airliner made its final commercial flight, marking the end of an era in aviation history.
On October 24, 2003, British Airways Concorde Flight 002 landed in Filton, England, concluding its last commercial journey.
The Concorde, capable of flying at Mach 2, first entered service in 1976 and symbolized the height of passenger aviation luxury.
Rising maintenance costs, limited seating capacity, and environmental concerns led to its retirement.
The tragic crash of Air France Flight 4590 in 2000, along with post-9/11 downturns, further impacted its viability.
By the early 2000s, both British Airways and Air France had decided to retire their fleets.
Concorde’s sleek design and supersonic speed left a lasting legacy despite its eventual withdrawal.
Museums around the world now display Concorde airframes as icons of technological achievement and ambition.
2003
Concorde
2018day.year
The world's longest sea crossing, the Hong Kong–Zhuhai–Macau Bridge, opens for public traffic.
The Hong Kong–Zhuhai–Macau Bridge, spanning 55 kilometres across the Pearl River Delta, opens for public traffic, becoming the world's longest sea crossing.
On October 24, 2018, after nine years of construction, the Hong Kong–Zhuhai–Macau Bridge officially opened to traffic.
Stretching approximately 55 kilometres, it connects Hong Kong, Zhuhai, and Macau across the Pearl River Delta.
This engineering marvel includes a series of bridges, tunnels, and artificial islands, designed to withstand earthquakes and typhoons.
Constructed at an estimated cost of US$20 billion, the project involved thousands of workers and advanced building techniques.
The opening ceremony featured high-profile officials from China and the Greater Bay Area, celebrating enhanced regional integration.
The bridge has cut travel time between Hong Kong and Zhuhai from four hours to just 30 minutes, transforming transportation in southern China.
2018
Hong Kong–Zhuhai–Macau Bridge