"It's been nine months and there's still no action on the federal level," Carlos Soto, the brother of a teacher who was killed in Newtown, told WFSB-TV. "We're not gonna go away."
The Sullivans and the parents of Jessica Ghawi, who also died in the Colorado shooting, also plan to meet with members of Colorado's congressional delegation to lobby for a renewed push on gun control.
"We're going to keep pushing along," Tom Sullivan said in an interview. "That's what we do."
The activists now hope lawmakers may be motivated to act now because the killings at the Navy Yard were close to Capitol Hill.