Giant granite monoliths weighing up to 17 tons were carefully put in place at the 9/11 Memorial and Museum on Saturday as part of a new installation honoring first responders.
The installation, called "The Glade," includes six monoliths pointing skyward along a path. The monoliths are intended to represent strength and determination through adversity.
A 600-ton crane lifted the monoliths into place at the memorial in lower Manhattan.
"This is an area of the 9/11 Memorial that is being created to recognize and honor everyone who is now, 18 years after the attack, still living with the consequences of 9/11 -- day in and day out," said Alice Greenwald, president and CEO of the memorial and museum.
"'The Glade' would also, when completed, be a tribute to the incredible selflessness, determination and commitment of everyone who worked on the recovery here at what was ground zero," Greenwald said.
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When "The Glade" was announced in 2017, there were more than 77,000 9/11 responders and survivors participating in the World Trade Center Health Program. More than 39,000 had at least one condition related to 9/11 and more than 6,000 had a 9/11 related cancer.
A dedication is planned for "The Glade" on May 30.