Las Vegas Sun - Photograph : 118th Boston Marathon

November 18, 2017

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A runner toward the back of the fourth and last wave of competitors kneels to kiss the start line as he begins his running of the 118th Boston Marathon, Monday, April 21, 2014, in Hopkinton, Mass.

Stephan Savoia / AP

A runner toward the back of the fourth and last wave of competitors kneels to kiss the start line as he begins his running of the 118th Boston Marathon, Monday, April 21, 2014, in Hopkinton, Mass.