The Kingdome collapsed in less than 20 seconds. That was 25 years ago

Wednesday marks the 25th anniversary of the demolition of the Kingdome, which made way for the construction of the stadium now known as Lumen Field.

Stunning stat: After the detonation of more than 4,000 pounds of explosives, it took less than 20 seconds for the Kingdome’s 25,000-ton roof to collapse into a pile of rubble…

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