Democratic presidential candidate Hillary Clinton, center, attends a ceremony for the 15th anniversary of the attacks of the World Trade Center at the National September 11 Memorial, in New York, Sunday, Sept. 11, 2016.
Democratic presidential candidate Hillary Clinton, center, attends a ceremony for the 15th anniversary of the attacks of the World Trade Center at the National September 11 Memorial, in New York, Sunday, Sept. 11, 2016. Andrew Harnik AP
Democratic presidential candidate Hillary Clinton, center, attends a ceremony for the 15th anniversary of the attacks of the World Trade Center at the National September 11 Memorial, in New York, Sunday, Sept. 11, 2016. Andrew Harnik AP