Today, Sept. 11, 2023, marks the 22nd anniversary of the 9/11 attacks on America.

On this day in 2001, almost 3,000 people were killed in a series of coordinated attacks involving commercial airplanes.

The attacks started at 8:46 a.m. when hijackers aboard American Airlines Flight 11 crashed the plane into the North Tower of the World Trade Center, killing everyone on board and hundreds inside the building. Just 17 minutes later, hijackers crash United Airlines Flight 175 into the World Trade Center’s South Tower, killing all on board and more inside the trade center.

Thousands more died when both towers crashed down less than an hour after being attacked.

The 9/11 attacks weren’t limited to New York. Flight 77 crashed into the western façade of the Pentagon at 9:37 a.m., killing 50 people on board and 125 inside the Washington, D.C. home of the Department of Defense. A fourth plane crashed in a field near Shanksville, Pennsylvania, killing all on board as passengers and crew attempted to wrest control from the hijackers.

Among the fatalities that day were 343 firefighters, 72 law enforcement officers and 55 military personnel.

Today is officially called “Patriot Day,” a national day of service and remembrance that commemorates the catastrophic events of Sept. 11, 2001. On every anniversary, the names of the victims who died in the Trade Centers are read aloud and services are also held at the Pentagon and near Shanksville, Pennsylvania, the site of the fourth plane crash.

Here is a look at quotes, inspirations, and more to remember Sept. 11, 2001, terrorist attacks:

“These acts of mass murder were intended to frighten our nation into chaos and retreat. But they have failed. Our country is strong. A great people has been moved to defend a great nation.” – Former President George W. Bush on Sept. 11, 2001.

“I may never know the answers to the questions that plagued me after 9/11. But I know if we lean on God and each other, we will be guided to a better, brighter future.” – Michael Hingson, 9/11 survivor

“You can be sure that the American spirit will prevail over this tragedy.” —Former United States Secretary of State Colin Powell

“Remember the hours after September 11 when we came together as one! It was the worst day we have ever seen, but it brought out the best in all of us.” – Former Secretary of State John Kerry

“We didn’t crumble after 9/11. We didn’t falter after the Boston Marathon. But we’re America. Americans will never, ever stand down. We endure. We overcome. We own the finish line.” —President Joe Biden

“Ten years have passed since a perfect blue sky morning turned into the blackest of nights. Since then we’ve lived in sunshine and in shadow, and although we can never unsee what happened here, we can also see that children who lost their parents have grown into young adults, grandchildren have been born and good works and public service have taken root to honor those we loved and lost.”  – Former New York City Mayor Michael Bloomberg

“Even the smallest act of service, the simplest act of kindness, is a way to honor those we lost, a way to reclaim that spirit of unity that followed 9/11. – Former President Barack Obama

“If we learn nothing else from this tragedy, we learn that life is short and there is no time for hate.” —Sandy Dahl, wife of Flight 93 pilot Jason Dahl

“Sept. 11, 2001 seems destined to be the watershed event of our lives and the greatest test for our democracy in our lifetimes.” – Lt. Col. Shelton F. Leskford

“It’s the nature of the world that most people have moved on, but the people directly involved with 9/11, for them, twice a day it’s 9/11.” – Robert Reeg, former FDNY firefighter.