Nixon on tape below learns for first time about import of Pentagon Papers, published 43 years ago tomorrow, from Al Haig. Amazingly, Nixon had "seen" the story but not read it and didn't think much about it until Haig call. Totally out to lunch on it. Then, below that, talking to Kissinger and John Mitchell the next day. Ellsberg, "leftwinger," ID as likely leaker. NYT "our enemy." And two weeks later, Nixon orders "going after that son of bitch Ellsberg." Remember break-in at his shrink's office?