Gabrielle Giffords, a former congresswoman shot and wounded more than two years ago, urged support for background checks on Wednesday.

She and her husband, Mark Kelly, spoke at a gun control rally in Tucson, Arizona, the same place where an assailant shot her in the head.

Kelly said his newly formed gun-control organization is sending a letter to U.S. Sens. John McCain and Jeff Flake, both Arizona Republicans, urging them to support background-check legislation.