Trust, but verify as a signature phrase by Reagan, who subsequently used it frequently when discussing U.S. relations with the Soviet Union. Using proverbs that the Russians could relate to may have helped relations between the two leaders. After Reagan used the phrase to emphasize "the extensive verification procedures that would enable both sides to monitor compliance with the treaty", at the signing of the INF Treaty, on 8 December 1987, his counterpart General Secretary Mikhail Gorbachev responded, "You repeat that at every meeting," to which Reagan answered, "I like it." While Reagan quoted Russian proverbs, Mr. Gorbachev quoted Ralph Waldo Emerson, who
US signals intelligence in the Cold War a decade of world change, with changes in Cold War alliances and emphasis, the first submarine attack since World War II in the context of a regional war involving extensive power projection, low- and medium-intensity operations, and continuing national policy development. Roughly from the late 1980s on, there was cooperation between the US and the PRC in collecting SIGINT of mutual interest, principally against Russia. It is believed that the Qitai and Korla sites, in Xinjiang (Sinkiang) are operated jointly by the Chinese and the US CIA Office of SIGINT Operations against Soviet missile tests and space launches, but their