Boston police officers watch as runners compete in the Boston Athletic Association's 5K race in Boston, Massachusetts April 19, 2014. The 118th running of the Boston Marathon will be held April 21. ... more 
Boston police officers watch as runners compete in the Boston Athletic Association's 5K race in Boston, Massachusetts April 19, 2014. The 118th running of the Boston Marathon will be held April 21. REUTERS/Brian Snyder (UNITED STATES - Tags: SPORT ATHLETICS) less 
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Reuters | Photo By BRIAN SNYDER / REUTERS
Sat, Apr 19, 2014 9:19 AM EDT