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The first completed shelter, located in Indiana, [5] was built during the Cold War to withstand a near direct hit from a 20-megaton nuclear bomb. [6] With accommodations for 80 people, the Indiana complex has a few spots left due to member relocations and family changes.
The 2nd Street Tunnel is a widely filmed and photographed tunnel on 2nd Street under Bunker Hill in Downtown Los Angeles, California.The Los Angeles Times described it as "the most recognizable city landmark most Americans have never heard of". [1]
To form these, a narrow, 1–2-metre (3.5–6.5 ft), flexible tent of thin wood is placed in a deep trench, and then covered with cloth or plastic, and then covered with 1–2 m (3.5–6.5 feet) of tamped earth. A large ground shock can move the walls of a bunker several centimeters in a few milliseconds.
Meta's Mark Zuckerberg and his wife Priscilla Chan reportedly plan to build a 5,000-square-foot underground bunker on their Hawaii property.
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Devil's Slide was the location of a military triangulation station and observation site (known as Devil’s Bunker) used during World War II as part of the harbor defense of San Francisco. Prior to the advent of radar, military personnel used binoculars and compasses to search for ships at sea and relay their coordinates to a central post.
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Map of the Chocolate Mountain Aerial Gunnery Range. The range is a 459,000 acres (1,860 km 2) [1] open-area, approximately 20 miles wide, east to west, and 50 miles long, northwest to southeast, with a special-use airspace of 700 square miles (1,800 km 2) [1] which is used for aerial bombing and live fire aerial gunnery practice.