Parkland shooting survivors, activists call on lawmakers to pass gun reforms as midterms approach

Body bags representing those killed by guns were placed on the National Mall.

On the fourth anniversary of the "March For Our Lives" rally, more than 1,100 body bags -- each one representing 150 people -- were placed on the National Mall Thursday to mark the more than 170,000 people who have died from gun violence in the U.S. since the 2018 shooting at Marjory Stoneman Douglas High School in Parkland, Florida.

"This could happen to your community again, unfortunately at this point in America, it's not a matter of what, just every single day," David Hogg, Parkland survivor and co-founder for March For Our Lives, told ABC News. "People ask me, 'Are you worried about the next part?' I say yes, but actually more worried about … that this is a preventable issue."

March For Our Lives is a nonprofit organization that formed after thousands came to Washington, D.C., to demand action in the gun violence epidemic in the wake of the Parkland shooting, which left 14 students and three staff members dead.

While the organization said it has made strides to combat violence in the past four years, it said Congress needs to do more.