C-SPAN archival video is available through the C-SPAN Video Library, maintained at the Purdue Research Park in West Lafayette, Indiana.[101] Unveiled in August 2007,[2] the C-SPAN Video Library contains all of the network's programming since 1987, totaling more than 160,000 hours at its completion of digitization and public debut in March 2010.[102][103] Older C-SPAN programming continues to be added to the library, dating back to the beginning of the network in 1979,[23] and some limited earlier footage from the National Archives, such as film clips of Richard Nixon's 1972 trip to China, is available as well.[104] Most of the recordings before 1987 (when the C-SPAN Archive was established) were not saved, except for approximately 10,000 hours of video which are slated to be made available online.[23] As of August 2020[update], the C-SPAN Video Library held over 261,000 hours of programming, and they have been viewed over 253 million times.