“My name is Margaret Merritt,” the woman began. “I am seventy-one years old and still alive, which makes me an old spy. We are rare and we are precious. I have been doing this job since 1965. I’ve seen presidents come and go, regimes fall and rise. I worked both sides of the wall, back when Berlin had one, and I knocked more than a few holes in it along the way. Both literally and figuratively,”
