Runners pass through scanners as they are checked by New York Police Department officers upon arrival for the New York City Marathon on Staten Island, New York November 3, 2013. In addition to ... more 
Runners pass through scanners as they are checked by New York Police Department officers upon arrival for the New York City Marathon on Staten Island, New York November 3, 2013. In addition to cheering supporters, runners in this Sunday's New York City Marathon will also be monitored by bomb-sniffing dogs, police scuba divers and surveillance helicopters to prevent an attack similar to the one at the Boston race earlier this year. REUTERS/Eduardo Munoz (UNITED STATES - Tags: SPORT ATHLETICS) less 
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Reuters | Photo By EDUARDO MUNOZ / REUTERS
Sun, Nov 3, 2013 9:55 AM EST