SHERMAN, Texas (KTEN) — Texomans united on the Grayson County Courthouse steps Friday to remember the men and women who made the ultimate sacrifice on September 11, 2001.

"That was the first time in our nation's history that we were attacked on our soil, and so we must never ever forget that," said Denison Mayor Janet Gott. 

Nearly 3,000 people were killed in the terrorist attacks utilizing two hijacked passenger planes at the World Trade Center in New York and a third at the Pentagon in Washington. A fourth plane believed on a mission to attack another target in the Nation's Capital crashed in Pennsylvania.

"Seeing our first responders run into these buildings that they knew they probably wouldn't come out of... I mean, it is just an expression of the bravery, the heroism of our first responders, of our average citizens," said Sherman Mayor David Plyler.

Air Force veteran Cindy Unerfusser still remembers what she was doing that infamous day.

"We were overseas and we were very concerned about our stateside," she said. "So everyone went and took an hour and called our family as much as we could, and then we had a big meeting to proceed on."

September 11, 2001 is remembered as a day our country united in the face of tragedy.

"The national pride, the unity of the country, the unity of the people in our counties and cities was amazing, and we've allowed that to pass," said Grayson County Sheriff's Office Chief Deputy Tony Bennie. "On days of this, at least one day of the year, we can all be that country again. The country who came together to support the first responders, to support our military."