(NEWSER) – Today marks one year since two bombs at the finish line of the Boston Marathon killed three people, injured hundreds, and horrified the nation, and the city is preparing for a week of commemorations—including this year's marathon, which will go ahead on Monday under tight security.

  • Joe Biden will lead a ceremony at Boston's Hynes Center today, while President Obama will mark the anniversary with a moment of silence at the White House, reports theAP. He will be with aides in the Oval Office at 2:49pm, the time the bombs went off.
  • A service of "remembrance, reflection, and renewal" this morning at the chapel of Massachusetts General Hospital, which dealt with some of the worst of the carnage, will be the first of many ceremonies to honor victims and first responders, the New York Times reports. Bells across the city will ring at 2:49pm.

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