Protests against the killing in Florida of 17-year-old Trayvon Martin continue in cities and on college campuses across the country. The case has focused attention on Florida’s “Stand Your Ground” law, which says a person may use deadly force in self-defense if under threat of harm, with no duty to retreat. Nearly half of states have some form of the law. Critics contend it’s dangerous and promotes “shoot-first-ask-questions-later” mentalities. Supporters argue that every citizen should have a legal right to defend himself, or herself, in life-threatening situations. Guest host Tom Gjelten of NPR and a panel of experts will discuss whether Stand Your Ground laws and permitting people to carry concealed weapons have made Americans safer.