The 71 Countries Targeted in Boston

The runners of the 2013 Boston Marathon hailed from 71 different countries, making Monday's attack very much an international incident, regardless who may have been responsible. The map below, created with data via the Boston Marathon website, shows the concentration of participating runners by nationality. Yellow signals those countries with 10 or fewer runners, green for 11 to 100, light blue for 101 to 200, and dark blue for the three countries with the highest number of participants (United Kingdom, Canada, and the United States). These numbers reflect the countries of residence for those participants who actually started the race, not just those who entered. (The Boston Marathon's website has a complete list of each country's participants.)

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