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Honor Guard members line up in front of the Forum Restaurant in Copley Square, where a wreath laying ceremony was held to commemorate the one year anniversary of the Boston Marathon bombings, Tuesday, April 15, 2014. (AP Photo/The Boston Globe, Wendy Maeda) BOSTON HERALD OUT, QUINCY OUT; NO SALES

BOSTON — Vice President Joe Biden says the courage shown by Boston Marathon survivors and those who lost loved ones is an inspiration for other Americans dealing with loss and tragedy.

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Biden spoke Tuesday at a ceremony in Boston honoring those killed and injured in the bombings near the finish line a year ago. He says four marathon survivors who spoke before he did showed "pure courage."

He also says that though he's not a Boston sports fan, Boston is an incredible city.

In Washington, President Barack Obama planned to observe the anniversary with a private moment of silence at the White House.

There will also be a flag-raising and a moment of silence at the marathon finish line at 2:49 p.m., when the bombs went off.