The couple was expected to discuss the initiative in an interview airing Tuesday on ABC News. The network offered a preview of the interview Monday and during "Good Morning America" on Tuesday. Kelly described a meeting with a father of a Connecticut victim in which he "just about lost it" after the parent showed him a picture of his child.
When asked by Sawyer about when such violence happens to school children, Giffords responded: "Enough."
In the op-ed piece, Kelly and Giffords discussed what they deem lawmakers' inaction on curbing gun violence.
"In response to a horrific series of shootings that has sown terror in our communities, victimized tens of thousands of Americans, and left one of its own bleeding and near death in a Tucson parking lot, Congress has done something quite extraordinary — nothing at all," Giffords and Kelly wrote in the op-ed.
"This country is known for using its determination and ingenuity to solve problems, big and small. Wise policy has conquered disease, protected us from dangerous products and substances, and made transportation safer. But when it comes to protecting our communities from gun violence, we're not even trying — and for the worst of reasons."
They hope to start a national conversation about gun violence and raise funds for political activity, so "legislators will no longer have reason to fear the gun lobby."
"The children of Sandy Hook Elementary School and all victims of gun violence deserve fellow citizens and leaders who have the will to prevent gun violence in the future," they wrote.
Tucson will mark the anniversary by ringing bells across the city at the moment that Jared Lee Loughner opened fire at a supermarket where Giffords was meeting with constituents.