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Roshi Joan Halifax came to New York City by way of New Orleans in the '60s with a thirst to engage in social justice, protesting "everything related to discrimination," she said, and the Vietnam War. Halifax, whose latest book is called "Standing at the Edge: Finding Freedom Where Fear and Courage Meet," went on to become a Buddhist teacher, Zen priest, anthropologist and a pioneer in the field of end-of-life care who has brought her work into psychiatric programs, penitentiaries and refugee camps.