In this June 18, 2015, file photo, construction workers secure a steel apparatus to a crane that will be used on the roof of the Oculus structure at the World Trade Center transportation hub, in New York.
In this June 18, 2015, file photo, construction workers secure a steel apparatus to a crane that will be used on the roof of the Oculus structure at the World Trade Center transportation hub, in New York. Mary Altaffer AP
In this June 18, 2015, file photo, construction workers secure a steel apparatus to a crane that will be used on the roof of the Oculus structure at the World Trade Center transportation hub, in New York. Mary Altaffer AP