Friday marks the 25th anniversary of the September 11 terror attacks — and once again the National September 11 Memorial & Museum will honor the 2,977 people who were killed in the tragedy with its annual commemoration ceremony.

The solemn event will take place on the hallowed ground where the Twin Towers once stood.

The 9/11 Memorial & Museum will livestream the ceremony on its website beginning at 8:40 a.m.

A drone show illuminated the skies over New York Harbor Wednesday night as part of a tribute marking the 25th anniversary of the Sept. 11 terror attacks.

The artwork, titled “2,977 Lights Over New York Harbor,” featured 2,977 lights, one for each person killed in the 9/11 attacks. The lights rose over the harbor before assembling into the outline of the Twin Towers at full architectural scale.

According to organizers, the commemorative public art installation was developed in collaboration with members of the 9/11 community, including family members, survivors and first responders.

The project was unveiled ahead of Friday’s anniversary observance and was presented as a free public event focused on reflection and unity.

On a day filled with terror, sadness, and shock, faith, too, was found amid the rubble.

Not only did people find faith on 9/11, but Archbishop Hicks highlights how it became something to rely on. “At the core, when everything is falling apart, people go right back to God, to faith, to hope, to those core things that hold us together as a people,” he explains.

More than 2,900 people were killed on that day alone. Out of the thousands of first responders who charged into the World Trade Center, the Pentagon, and the field in Pennsylvania, hundreds died selflessly trying to save others.

In the city where the two World Trade Center towers once stood, acts of remembrance, services, Masses, and memorials will commemorate the anniversary—from walks of remembrance and wreath-laying ceremonies to dedications and light tributes.