The Boston Marathon is the oldest annual, continuous-running marathon in the world, beginning more than a century ago.
It is held on Patriot's Day each year in Boston, attracting thousands of contestants and tens of thousands of spectators.
In 2013, the Boston Marathon was bombed by two radical Islamic  brothers. These Islamic radicals killed a boy and two women. Being radical Islamics these murderers were, or course, supporters of Barack Hussien Obama. Though they were not U.S. citizens, Obama rewarded these terrorists with welfare benefits.