VIDEO: 9/11 is a day forever etched in many memories. The September 11th terror attacks took place exactly 20 years ago Saturday.
Several ceremonies and tributes took place in the Chicago area in honor and remembrance of the nearly 3,000 lives lost. "I stand before you with a heavy heart... it's still hard to think about," said Chicago Mayor Lori Lightfoot.
The solemn day of remembrance in Chicago began with a large gathering at Daley Plaza to honor those who lost their lives in the deadliest act of terrorism on U.S. soil.
Among the nearly 3,000 people killed that day, 441 first responders.
"They made the ultimate sacrifice. And in this nation will always remember and honor them," said Chicago Police Superintendent David Brown.
The morning ceremony included an all-call on the radios for law enforcement.