It has been 20 years since that fateful Tuesday on September 11th, 2001, a day that marked a before and after for the United States when it came to homeland security. In New York the city had begun preparations for the mayoral elections, but all that changed when at 8:46 AM American Airlines Flight 11 crashed into the North Tower of the World Trade Center. Only moments later at 9:03 AM United Airlines Flight 175 hits the South Tower of the World Trade Center and what was thought to be an airline accident is immediately elevated as a terrorist attack.

So, what happened on September 11th, 2001? Eventually the world would come to know that four airplanes were hijacked by members of the Islamist terrorist group Al-Qaeda, with the intention to hit key landmark targets (The World Trade Center, Pentagon, and U.S. Capitol Building) of the United States and register a catastrophic event that would have mass casualties. Three of the four hijacked planes hit their targets with United Airlines flight 93 crashing in Shanksville, Pennsylvania after the passengers onboard revolted against the terrorist and tried to get control of the aircraft.

Since that day, every year the United States government and local officials have held memorial services and days of remembrance for the victims, brave firefighters, police officers, and other personnel who lost their lives due to those barbaric attacks. Now 20 years later various commemorations and services will occur throughout the United States, here is a list of some of those events to take place on the 20th anniversary of September 11th.

September 11th Television coverage

Many of the major networks such as CNN, ABC, and CBS will have full coverage of the day’s events with special programming. CBS will have it under the banner 9/11: Twenty Years Later, ABC 9/11 Twenty Years Later: America Remembers, and Spanish network Telemundo will have it under the banner: 20 Years Later: We’ll Never Forget.

All other news networks such as Fox News, PBS, C-SPAN, Univision will have full day and documentary coverage of the day that changed the United States forever.

Ground Zero Ceremony in New York City 

In Lower Manhattan at the site of the World Trade Center family members will read the names of loved ones who lost their lives in the towers and corresponding area because of the attack. There will be six moments of silence to recognize when each tower was struck, when each tower fell, when the Pentagon was attacked, and when Flight 93 crashed.

President Joe Biden and First Lady Jill Biden will attend Ground Zero for the commemoration. The President and First Lady will later travel to all three sites of the September 11 attacks to attend the various memorials.

Later on, in the day the annual Tribute in Light, which projects beams of light into the sky as a reference to the two towers of the World Trade Center. The lights are expected to be turned on at 7:11 PM EST and will last until dawn of the next day.

Comedy event at Madison Square Garden

Former Daily Show host Jon Stewart will have a comedy show at MSG, which will include the participation of Dave Chappelle, Jimmy Fallon, Amy Schumer and Pete Davidson.

Former President George W. Bush at Shanksville, Pennsylvania

The Former President of the United States and President during the attacks on 9/11 George W. Bush will speak at the Flight 93 National Memorial in Shanksville, Pennsylvania. The speech will be livestreamed at 9:45 AM EST on the Flight 93 National Memorial Facebook Page.

There will also be a private service for the families of the victims of United 93 at the National Memorial site near Shanksville, Pennsylvania.

At the Pentagon

The Department of Defense will hold a private event for the 184 victims on Saturday morning in Northern Virginia. At sunrise, a flag will be unfurled on the west side of the Pentagon where American Airlines Flight 77 struck.

In Boston

Families with Massachusetts connections to the September 11 attacks will get together with state and city officials at the JFK Presidential Library for various events to commemorate the 206 victims. At Logan Airport, where American Airlines Flight 11 and United Airlines Flight 175 took off from, TSA officials will hold a moment of silence at 8:46 AM.

In Cleveland 

In Ohio the Northeast Ohio Foundation for Patriotism will hold a service and remembrance at the University Circle neighborhood with a ceremony at the Louis Stokes Cleveland VA Medical Center.

In New Jersey

In the Garden State various events will take place at Bernardsville, Bridgewater, and Somerset County. At Somerset County there will be an event starting at 8:46 AM at the Somerset County Historic Court House.