West Virginia National Guard Staff Sgt. Sean Ruth, right, mourns the loss of his father, Army Chief Warrant Officer 4 William Ruth, who died in the September 11 attack on the Pentagon, while at the September 11th Pentagon Memorial on the 16th anniversary at the Pentagon, Monday, Sept. 11, 2017. He was visiting with his family including his daughter Ayslynn Ruth, 4. (AP Photo/Jacquelyn Martin)