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Caption: (140410) -- WASHINGTON D.C., April 10, 2014 (Xinhua) -- The Washington Monument is seen through cherry blossoms on the edge of the Tidal Basin in Washington D.C., capital of the United States, April 9, 2014. (Xinhua/Yin Bogu) XINHUA /LANDOV   Photographers/Source: YIN BOGU/Xinhua /Landov
Caption: (140410) -- WASHINGTON D.C., April 10, 2014 (Xinhua) -- The Washington Monument is seen through cherry blossoms on the edge of the Tidal Basin in Washington D.C., capital of the United States, April 9, 2014. (Xinhua/Yin Bogu) XINHUA /LANDOV   Photographers/Source: YIN BOGU/Xinhua /Landov

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    Why is Washington D.C. sinking?

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Why is Washington D.C. sinking?

According to research from USGS, Washington D.C. will sink six inches in the next century due to a geological phenomenon called the "forebulge collapse."

Why is Washington D.C. sinking?

According to research from USGS, Washington D.C. will sink six inches in the next century due to a geological phenomenon called the "forebulge collapse."