It’s been more than 14 years since terrorists attacked the United States on Sept. 11, 2001. On Sunday, about 100 people showed  they haven’t forgotten as they took part in a fundraiser at 2 Monument Square in Portland.

Firefighters put on their full gear, oxygen tanks and all, and started climbing the stairs of 2 Monument Square. To remember the 343 firefighters who died on Sept. 11, they went to the top floor 10 times for a total of 110 flights, the number of floors in each of the Twin Towers at the World Trade Center. The event raised an estimated $3,500 for the National Fallen Firefighters Foundation.

About 100 participants climbed the stairs at 2 Monument Square on Sunday to honor the firefighters who gave their lives on 9/11 and to raise money for the National Fallen Firefighters Foundation. They climbed to the top floor 10 times for a total of 110 flights – the number of floors in each of the Twin Towers.

About 100 participants climbed the stairs at 2 Monument Square on Sunday to honor the firefighters who gave their lives on 9/11 and to raise money for the National Fallen Firefighters Foundation. They climbed to the top floor 10 times for a total of 110 flights – the number of floors in each of the Twin Towers. Ben McCanna/Staff Photographer

Firefighter Mike Gallagher, center, of the Ellington, Conn., fire department was one of about 100 participants to climb the stairs at 2 Monument Square on Sunday in remembrance of the firefighters lost on Sept. 11 and to raise money for the National Fallen Firefighters Foundation.

Firefighter Mike Gallagher, center, of the Ellington, Conn., fire department was one of about 100 participants to climb the stairs at 2 Monument Square on Sunday in remembrance of the firefighters lost on Sept. 11 and to raise money for the National Fallen Firefighters Foundation. Ben McCanna/Staff Photographer