McClellan: The big thing was not having systems in place, public health, health care, etc., that were well prepared for the kind of war we can fight now against new infections. There are interoperable systems on the health care side, but we haven't brought those to bear for working with public health and being systematic about being able to know when there are new cases being reported somewhere, rapidly connecting that to a local and federal response system with accurate data. Zelikow: (We hope) people will read the book in a way that's reassuring, because you can really see human stuff that people can do to fix things.