119th Boston Marathon
CJ Gunther, EPA
Caroline Rotich of Kenya celebrates while crossing the finish line to win the women's division of the 119th Boston Marathon in Boston, Masss, on April 20, 2015.
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119th Boston Marathon
Katherine Taylor, EPA

Competitors start the 119th Boston Marathon in Hopkington, Mass., on April 20, 2015.

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119th Boston Marathon
Charles Krupa, AP
Bill Richard, right, father of 2013 Boston Marathon bombing victim Martin Richard, prepares to put the victor's wreath on women's wheelchair division winner Tatyana McFadden of Russia at the Boston Marathon, on April 20, 2015, in Boston.
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119th Boston Marathon
Elise Amendola, AP

Tatyana McFadden of Russia crosses the finish line to win the women's wheelchair division of the Boston Marathon on April 20, 2015, in Boston.

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119th Boston Marathon
Stephan Savoia, AP

Runners leave the starting line at the Boston Marathon on April 20, 2015, in Hopkinton, Mass.

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