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Harvard

Florida was the first state to enact a "stand your ground" law. Under the law, a person is allowed to use lethal force — and has no duty to retreat — if they believe they are in danger.

Since it was enacted in 2005, the law has drawn high-profile controversies, including the shooting of unarmed teenager Trayvon Martin.

Harvard professor Caroline Light was recently in Miami to talk about the law’s historical roots and her book “Stand Your Ground: A History of America's Love Affair with Lethal Self-Defense.”