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piers bash ricin letter latest_00010326.jpg
piers bash ricin letter latest_00010326.jpg

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    Sources: No link between marathon, ricin

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Sources: No link between marathon, ricin

CNN's Dana Bash reports police believe the timing of the Boston Marathon attack and the ricin letter is coincidental.

Sources: No link between marathon, ricin

CNN's Dana Bash reports police believe the timing of the Boston Marathon attack and the ricin letter is coincidental.