As it does every year, New York City pays tribute and holds a commemoration ceremony to remember the victims of the September 11, 2001, terrorist attacks. The heart of the 9/11 Memorial Museum’s mission remains the site of the event. The 25th anniversary commemoration ceremony takes place in M emorial Plaza, where family members of the victims and survivors gather once again to read aloud the names of the 2,983 people, including children, who died in the September 11 attacks and the 1993 World Trade Center bombing. Throughout the ceremony, there are six moments of silence marking the times each of the World Trade Center towers was struck, when each tower collapsed, and the corresponding times of the Pentagon attack and the crash of United Airlines Flight 93 in Pennsylvania. The program begins at 8:30 a.m. The first moment of silence occurs at 8:46 a.m. Families may enter the Memorial Plaza starting at 7:30 a.m., and the commemoration concludes at approximately 1:00 p.m. The invitation and/or letter you receive in August, as well as your P and T case numbers or Memorial Park ID cards, serve as your family’s credentials for admission to the ceremony. The Museum will be open exclusively to family members on September 11, with the first entry at 8:00 a.m. and the last at 5:30 p.m. The Museum will close at 7:00 p.m. due to capacity limitations and to help ensure timely admission. Due to capacity limitations at the Museum and to help ensure your timely entry, advance reservations are recommended. As always, admission to the Museum is free for family members. Each family member must have a ticket to enter the Museum. To book tickets, go here. How to watch the commemoration NBC New York will have live coverage on our linear and digital platforms starting at 8:26 a.m. Moments of Silence Each year, the following moments are observed as part of the official September 11 anniversary commemoration ceremony held at the World Trade Center for the families of the victims. 8:46 a.m.: The tragic moment when the first plane, American Airlines Flight 11, crashed into the North Tower of the World Trade Center. 9:03 a.m.: The second moment of silence is observed, coinciding with the exact moment the second plane crashed into the South Tower. 9:37 a.m.: American Airlines Flight 77 crashes into the Pentagon near Washington, D.C., a tragedy in which all 64 passengers died. 9:59 a.m.: The South Tower collapses. 10:03 a.m.: After learning of the other attacks, the passengers of United Airlines Flight 93 launch a counterattack against the hijackers aboard their plane to try to regain control of the aircraft. In response, the hijackers crashed the plane into an empty field near Shanksville, Pennsylvania. It caused the deaths of 44 passengers on board. 10:28 a.m.: The North Tower collapsed, leaving the 16-acre World Trade Center site in ruins and causing collateral damage that affected all adjacent properties and streets. Rescue efforts began immediately. Ringing of the bells The ringing of the bells on September 11th can take place at 8:46 a.m., the start of the attacks, or at any of the times mentioned above. Tribute of Light in Lower Manhattan The Tribute of Light is a commemorative public art installation first unveiled six months after 9/11 and then every year thereafter, from dusk till dawn on the night of September 11. It has become an iconic symbol honoring the victims. View this post on Instagram A post shared by NBC New York (@nbcnewyork) Mounted from the roof of the Battery Parking Garage at the 9/11 Memorial, the beams reach up to four miles into the sky and are composed of 88 7,000-watt xenon bulbs arranged in two 48-foot squares, echoing the shape and orientation of the Twin Towers. The installation can also be seen from a 60-mile radius around Lower Manhattan. Learn more here. ...read more read less