April 15 - U.S. Vice President Joe Biden paid tribute to those killed in the Boston Marathon bombings, but sent a message of hope to the survivors and for the world -- ''America will never, ever ever stand down.'' Rough Cut (no reporter narration).
ROUGH CUT (NO REPORTER NARRATION) Boston marked the anniversary of the Boston Marathon bombing, which killed three people and injured 264, on Tuesday with a memorial service to feature remarks by survivors of the attack and U.S. Vice President Joe Biden. To the survivors, Biden said, "You have become the face of America's resolve." About 2,500 invited guests attended the memorial at Boston's Hynes Convention Center, just blocks from the race's finish line, where a pair of homemade pressure-cooker bombs detonated a year ago, ripping through the crowd of thousands of spectators. Biden spoke of the participants in this year's upcoming Boston Marathon, saying "You will send a resounding message around the world -- not just to the rest of the world, but to the terrorists -- that we will never yield.... America will never, ever ever stand down." The April 15, 2013, attacks, which federal prosecutors have blamed on a pair of ethnic Chechen brothers, killed Martin Richard, 8, Krystle Campbell, 29, and Chinese national Lu Lingzi, 23. It was the worst mass-casualty attack on U.S. soil since the September 11, 2011 attacks that killed some 3,000 people. Three days after the bombings, a Massachusetts Institute of Technology police officer, Sean Collier, 27, was shot dead by the same brothers, prosecutors said.