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KELLY MCEVERS, HOST:
This is MORNING EDITION from NPR News. I'm Kelly McEvers.
DAVID GREENE, HOST:
And I'm David Greene, good morning.
One year ago today, the Boston Marathon became more than just one of the world's major sporting events. It became a target. As runners crossed the finish line just before 3:00 in the afternoon, two bombs exploded. Three people were killed and dozens more were wounded. This year the marathon is scheduled for next week.