TriPod: New Orleans at 300 returns with a tripod Xtra produced by Laine Kaplan-Levenson. In this tripod xtra, we hear an abridged talk given by Dr. Erin Greenwald, curator of the Historic New Orleans Collection's 'The Founding Era' exhibit. Greenwald traces New Orleans' African roots -- from their kidnapping in Africa, through the middle passage, to the seminal role Africans played in the founding of our city.