I would happily approve of changes in laws about sales of firearms like olddude suggests. Many guns used in crimes in Wash DC have been traced to sales in the Virginia gun shows Bobert mentions.

I would also REALLY hope for ownership to be limited to those people who pass a carefully controlled course and detailed background check...including school records and mental health evaluations. I know several people who I know have 'carry' permits who I would never worry about... but it isn't the trained, sane ones we usually worry about.

I say 'usually'...for some reason, I remember the name Howard Unrauh, who was an army veteran and supposedly 'safe'.