The National Rifle Association today broke the silence it's maintained since last week's elementary-school massacre in Connecticut. The NRA's top spokesman said, "The only thing that stops a bad guy with a gun is a good guy with a gun," demanding that Congress pay for armed guards in every schoolyard. Much of Wayne LaPierre's lengthy statement today played on the fear that mass killers are planning more attacks on American children. He was defensive about attacks on his organization and what he characterized as the media's predisposition to be against guns. Earlier this morning, President Obama released a videotape urging public support for renewing the assault-weapons ban and other new regulations. Can a culture captivated by guns ready for change?