A visitor to the National September 11 Memorial arranges flowers on the north pool in September 2016, in New York.
A visitor to the National September 11 Memorial arranges flowers on the north pool in September 2016, in New York. Mary Altaffer Associated Press, file
A visitor to the National September 11 Memorial arranges flowers on the north pool in September 2016, in New York. Mary Altaffer Associated Press, file