The United States Holocaust Memorial Museum (USHMM) is the United States' official memorial to the Holocaust. The USHMM documents, studies and interprets Holocaust history, while also actively preserving the memory of those events. The USHMM’s collections contain more than 12,750 artifacts, 49 million pages of archival documents, 80,000 historical photographs, 200,000 registered survivors, 1,000 hours of archival footage, 84,000 library items, and 9,000 oral history testimonies. It also has teacher fellows in every state in the United States and almost 400 university fellows from 26 countries since 1994.