(CNN) -- A park in St. Louis, Missouri is honoring victim's of 9/11 ahead of the 20th anniversary.
Volunteers put up more than 7,000 flags in Forest Park. That's one flag for each American service member and first responder who has died since 9/11. Each flag includes dog tags and the picture of a service-member killed in wartime.
The 13 service members killed in the terrorist attack in Kabul, Afghanistan are among those being remembered.
The display covers nearly 11 miles of flag rows across ten acres.
Flag teams are helping families and friends find specific heroes, based ont he year of their death.
America's Heartland Remembers is the group that organizes the annual event, which is set to run through September 12.