NRA calls for armed police in schools as Newtown victims honored 26 angels representing the 26 victims are staked into the ground near Sandy Hook Elementary School in Newtown, Connecticut. A short time later, Wayne LaPierre, executive director of the National Rifle Association, held a news conference to call for placing armed police officers in every school. The group had kept a low profile since the shootings. He had killed his mother, Nancy, before going to the school. 20 beautiful children & 6 remarkable adults. Together, we will carry on & make our country worthy of their memory. -bo," President Barack Obama tweeted. To mark the observance, bells on the National Cathedral and churches across the country, tolled 26 times. The NRA's Internet presence went black initially and the gun rights organization had declined comment until Tuesday, when it issued a statement saying the group and its members were "shocked, saddened and heartbroken" by the news. At the news conference in Washington, LaPierre said the children at the Sandy Hook school were "utterly defenseless" against Lanza because there were no armed adults. "Can't we afford to put a police officer in every single school?" he asked. The news conference was interrupted by two protesters. A man was escorted out when he tried to shout down LaPierre with anti-NRA remarks, and a woman who unfurled a banner and accused the organization of having "blood on its hands" was also removed from the room by security. Now, we must speak ... for the safety of our nation's children. Because for all the noise and anger directed at us over the past week, no one -- nobody -- has addressed the most important, pressing and immediate question we face: How do we protect our children right now, starting today, in a way that we know works? LaPierre asked. LaPierre criticized laws that ban guns around schools and blamed the violence on the entertainment industry, especially video games and movies. The only way to stop a monster from killing our kids is to be personally involved and invested in a plan of absolute protection. The only thing that stops a bad guy with a gun is a good guy with a gun," he said. Obama again ordered flags to half-staff Friday. On Thursday the administration began its effort to change U.S. gun laws.