North Carolina's concealed handgun law, which becomes 10 years old next month, has worked well. Even gun-control advocates concede that point.Now one gun-rights group - Grass Roots North Carolina - hopes the law will be expanded so that people with concealed handgun permits will have fewer restrictions on where they can carry their weapons. We think that there is some merit in the organization's idea. For example, the group's president recently suggested that permit-holders should be allowed to carry their weapons in public parks. It would provide protection for joggers from potential attackers. Gun-control advocates would likely balk at this...