Celebrity shutterbug Annie Leibovitz talked about her work during a sitdown Monday with historian Doris Kearns Goodwin at Louisa May Alcott’s Orchard House in Concord. Leibovitz is in town for an exhibit of her photography at the Concord Museum. The show, “Annie Leibovitz: Pilgrimage,” opens Thursday and there are nine Concord scenes among the 70 photos.