members and destroyed communities. These efforts included both personal accounts and memoirs of events written by individual survivors about the events that they had experienced, as well as the compilation of remembrance books for destroyed communities called Yizkor books, usually printed by societies or groups of survivors from a common locality. Survivors and witnesses also participated in providing oral testimonies about their experiences. At first, these were mainly for the purpose of prosecuting war criminals and often only many years later, for the sake of recounting their experiences to help process the traumatic events that they had suffered, or for the historical record and educational purposes. Several programs were undertaken by organizations, such the as the USC Shoah Foundation Institute, to collect as many oral history testimonies of survivors as possible. In addition, survivors also began speaking at educational and commemorative events at schools and for other audiences, as well as contributing to and participating in the building of museums and memorials to remember the Holocaust. Memoirs Some survivors began to publish memoirs immediately after the war ended, feeling a need to write about their experiences, and about a dozen or so survivors' memoirs were published each year during the first two decades after the Holocaust, notwithstanding a general public that was largely indifferent to reading them. However, for many years after the war, many survivors felt that they could not describe their experiences to those who had not lived through the Holocaust. Those who were able to record testimony about their experiences or publish their memoirs did so in Yiddish. The number of memoirs that were published increased gradually from the 1970s onwards, indicating both the increasing need and psychological ability of survivors to relate their experiences, as well as a growing public interest in the Holocaust driven by events such as the capture and trial of Adolf Eichmann in 1961, the existential threats to Jews presented by the Six-Day War in 1967 and the Yom Kippur War of 1973, the broadcasting in many countries of the television documentary series "Holocaust" in 1978, and the establishment of new Holocaust memorial centers and memorials, such as the United States Holocaust Memorial Museum. The writing and publishing of memoirs, prevalent among Holocaust survivors, has been recognized as related to processing and recovering from memories about the traumatic past. By the end of the twentieth century, Holocaust memoirs had been written by