i'm andrea mccarren in baltimore.r questions answered by the john hopkins center for gun policy and research coming up. intlz we continue our coverage -- >>> we continue our coverage of the tragedy in connecticut and how it could possibly change our gun laws with the slaughter of 20 children the tipping point. andrea mccarren looked at a body that studies gun violence from a public health perspective. >> a nonpartisan research center, bruce. this may be the tipping point like you and i were discussing. consider there. there are an estimated 280 million guns in the hands of private citizens right now. that's one for every man, woman and child in this country. we use social media to solicit your questions and here's what we found. >> i do think that this connecticut shooting might represent a real game change. >> reporter: one question you had, why is it so hard for the u.s. to enact policies like in the u.k. that have reduced mass shootings. what actions can be taken? >> households that have both guns and young childre

andrea mccarren solicited your questions via social media and turns to johns hopkins for answers. >> i do think that this connecticut shooting might represent a real game change. >> one question you had. why is it so hard for the u.s. to enact policies like in the u.k. that have reduced mass shootings? what actions can be taken? >> of households that have both guns and young children in them, more than 50% of the respondents say that the gun is stored, not locked up. >> reporter: another question. how can we convince gun enthuse arizonas that controls -- enthuseiasts that controls don't end the right to own guns. >> one fear is that greater restrictions are a step down the slippier slope towards completely banning handguns, but that option has now been taken off the political table by the supreme court. so gun enthusiasts shouldn't have anything to fear from universal background checks. >> reporter: another question you had. how do we get more guns into the hands of responsible people and more guns at school to prevent similar scenarios from happening? >> the argument goes criminals