John Hancock Center was a large skyscraper located in Chicago. It had a height of 457 meters (1500 ft) and was completed in 1969 Becoming it the Tallest building in Chicago until 1974 the year of Completion of the Willis Tower.

During the Eruption of the Yellowstone Supervolcano, the Yellowstone ash cloud spreads across North America and hits Chicago engulfing the John Hancock Center killing hundreds of people inside. During the 2012 Tsunamis, the remains of the John Hancock Center were swept away by a tsunami of 1500 meters along with the rest of the United States.

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