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boston marathon yellin white house security _00011207.jpg

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    White House area on lockdown after blasts

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White House area on lockdown after blasts

CNN's Jessica Yellin reports that Washington, D.C., is on a heightened security alert following explosions in Boston.

White House area on lockdown after blasts

CNN's Jessica Yellin reports that Washington, D.C., is on a heightened security alert following explosions in Boston.