Henry Kissinger used his copies of memoranda of conversations extensively while writing his memoirs of the Nixon years, White House Years (1979) and Years of Upheaval (1982). The Kissinger Transcripts show that he was very careful about what he included and excluded. Rather than contradicting his memoirs, the transcripts add much information that Kissinger deliberately left out of the record. The biggest omission is the extraordinary degree to which Nixon and Kissinger tilted U.S. policy toward Beijing, to the point of offering the Chinese sensitive intelligence information on Soviet military deployments, in their effort to cement a "tacit" alliance against the Soviet Union. The other "sins of omission" rather than "commission" fall into three critical areas: 1) material that would seriously irritate or disappoint friends and allies, such as the Japanese, the Taiwanese, and the Germans, 2) evidence of just how far Kissinger was willing to deceive and manipulate Soviet interlocutors like Dobrynin, or 3) information that remained officially classified at the time, e.g., the existence of satellite reconnaissance programs.