About this recording 2–56 President Richard M. Nixon White House operator April 28, 1971 White House Operator Richard M. Nixon Conversation No. 2-56 Date: April 28, 1971 Time: Unknown between 7:45 pm and 7:48 pm Location: White House Telephone The President talked with the White House operator. Call to H. R. (“Bob”) Haldeman Secret White House Tapes | Richard M. Nixon Presidency 2–56 Backward Play Stop Forward Download audio Previous 488–9 Next 490–1 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 490–1 audio icon 42–106 audio icon 251–18 audio icon 251–19 audio icon 490–2 audio icon 251–20 audio icon 251–21 audio icon 251–22 audio icon 251–23 audio icon 251–24 audio icon