President Barack Obama offers a tissue to a woman, center, who was overcome with emotion as first lady Michelle Obama, second left, stands with him as they attend a memorial service for the victims of the Washington Navy Yard shooting at Marine Barracks Washington Sunday, Sept. 22, 2013. A gunman killed 12 people in the Navy Yard on Monday, Sept. 16, 2013, before being fatally shot in a gun battle with law enforcement. The president and first lady Michelle Obama also visited with the victims’ families. (AP Photo/Charles Dharapak)