Boston University BU, Marsh Plaza, 117 annual Boston Marathon, patriot day, tragedy bombing copley square, flag half mast
April 17, 2013
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Boston, Nation Mourn

American flags were flown at half-mast across the country on April 16, the day after two fatal bombings killed 3 and injured more than 150 at the Boston Marathon finish line. President Obama has ordered flags at federal facilities worldwide at half-mast until sunset April 20. Photo by Kalman Zabarsky