Traditionally, there are no political speeches at the Ground Zero commemoration. Victims’ relatives read their names, pay tribute to first responders and call for national unity.

The 2001 attacks unfolded across New York, Virginia, and Pennsylvania, killing nearly 3,000 people and permanently changing American life.

Here's how New York City is marking 25 years since 9/11 with a series of tributes honouring those who lost their lives