On June 17, 1992, President Yeltsin revealed that after the 1991 failed coup attempt concerted attempts were made to locate Soviet-era documents relating to KAL 007. He mentioned the discovery of "a memorandum from K.G.B. to the Central Committee of the Communist Party," stating that a tragedy had taken place and adding that there are documents "which would clarify the entire picture." Yeltsin said the memo continued to say that "these documents are so well concealed that it is doubtful that our children will be able to find them." On September 11, 1992, Yeltsin officially acknowledged the existence of the recorders, and promised to give the South Korean government a transcript of the flight recorder contents as found in KGB files.