A detailed view of a memorial on Boylston Street commemorating the two-year anniversary of the 2013 Boston Marathon bombings, on April 15, 2015 in Boston, Massachusetts. Two years ago, two pressure cooker bombs killed three and injured an estimated 264 others during the Boston marathon on April 15, 2013.
A detailed view of a memorial on Boylston Street commemorating the two-year anniversary of the 2013 Boston Marathon bombings, on April 15, 2015 in Boston, Massachusetts. Two years ago, two pressure cooker bombs killed three and injured an estimated 264 others during the Boston marathon on April 15, 2013. Tim Bradbury Getty Images
A detailed view of a memorial on Boylston Street commemorating the two-year anniversary of the 2013 Boston Marathon bombings, on April 15, 2015 in Boston, Massachusetts. Two years ago, two pressure cooker bombs killed three and injured an estimated 264 others during the Boston marathon on April 15, 2013. Tim Bradbury Getty Images