(CNN) -- Facing widespread outrage over the National Rifle Association's response to the Newtown, Connecticut, school massacre, the group's president Thursday tried to clarify, saying that schools should decide for themselves how to protect their children.
"Some will want police officers there. Others of them will want private security guards," David Keene said in an exclusive CNN interview. "There may be some place they want volunteers to do it. We're willing to work with everybody on those questions."
The nation's largest teachers union liked some of Keene's comments, but said the NRA is ignoring crucial points to prevent school shootings.
Keene's interview came nearly a week after NRA Executive Vice President Wayne LaPierre addressed media -- but did not take questions -- and said that all schools in the United States should immediately have armed officers. That is the only way, LaPierre said, to prevent another massacre like that at Sandy Hook Elementary, which left 20 children and six adults dead.