U.S. President Barack Obama joins other public officials and religious leaders gathered in Boston for an interfaith memorial service for the victims of the Boston Marathon bombings earlier this week. The service, called the "Healing of our City," was held at Boston's Cathedral of the Holy Cross.
U.S. President Barack Obama speaks at an interfaith memorial service for the victims of the bombing at the Boston Marathon at the Cathedral of the Holy Cross in Boston, Massachusetts, April 18, 2013.
People attend the interfaith memorial service at the Cathedral of the Holy Cross for the victims of the Boston Marathon bombing in Boston, April 18, 2013.
Nursing students Katie Robinson, left, and Megan Beach listen to a broadcast on their phones outside an interfaith service attended by President Barack Obama at the Cathedral of the Holy Cross, held in the wake of Boston Marathon explosions.
A memento of flowers in a running shoe rests at a makeshift memorial in Boston's Back Bay neighborhood, April 18, 2013, a few blocks from the finish line of the Boston Marathon.