Science, care preserve DC's original cherry trees

Cherry blossoms are in bloom at sunrise across from the Jefferson Memorial in Washington on Wednesday March 26, 2008. The trees are predicted to be in peak bloom from March 27 through April 3, 2008, according to the park service's chief horticulturist, Rob DeFeo. (AP Photo/Jacquelyn Martin))
March 22, 2012 6:58:39 AM PDT
The pink and white cherry blossoms that color the nation's capital and draw a million visitors each spring began with trees that have survived for a century.

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