Sophia recently found a way to honor the 343 firefighters who died that day trying to help others.
She took part in a 9/11 Memorial Stair Climb. It’s an event where people climb about the same number of stairs as there are in 110 floors of a building. That was the number of floors in each of the World Trade Center buildings.
Many communities hold these events across the country. Hundreds of people participate, or take part, in states like North Carolina, Colorado, California, and Florida.
Some events are held in office buildings. Other stair climbs use parking garages or sports stadiums.
“My parents run the event in Columbia,” Sophia told Scholastic News. “My brother, Jeffrey, and I climbed this year.”