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BOSTON, MA - APRIL 21:  Photos of the deceased are displayed following Mass at the Cathedral of the Holy Cross on the first Sunday after the Boston Marathon bombings on April 21, 2013 in Boston, Massachusetts. The Mass honored the victims of the bombings and subsequent manhunt as well as first responders.  (Photo by Mario Tama/Getty Images)
BOSTON, MA - APRIL 21:  Photos of the deceased are displayed following Mass at the Cathedral of the Holy Cross on the first Sunday after the Boston Marathon bombings on April 21, 2013 in Boston, Massachusetts. The Mass honored the victims of the bombings and subsequent manhunt as well as first responders.  (Photo by Mario Tama/Getty Images)

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Honoring the Boston bombing victims

One week after the deadly bombings, Boston and the nation observes a moment of silence. Erin Burnett reports.

Honoring the Boston bombing victims

One week after the deadly bombings, Boston and the nation observes a moment of silence. Erin Burnett reports.