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Why we're running for Boston

By John D. Sutter, CNN
April 25, 2013 -- Updated 0947 GMT (1747 HKT)
Andrew Bunyard, 28, works at a hospital in Boston. "I refuse to forget what I witnessed and heard," he said. Andrew Bunyard, 28, works at a hospital in Boston. "I refuse to forget what I witnessed and heard," he said.