The textual archives contain more than 44 million pages of personal papers and official documents subject to the Presidential Records Act, as well as personal records from associates connected with President Bush's public career as Congressman, Ambassador to the United Nations, Chief of the U.S. Liaison Office in China, Chairman of the Republican National Committee, and Director of the Central Intelligence Agency. As in all NARA presidential libraries, records are housed in acid-free storage (Hollinger) boxes in a balanced humidity and temperature atmosphere. The archival storage area houses of records and the library has a National Security vault holding of Presidential Records. In addition to memoranda, speeches, and reports found in the textual collection, there is an extensive audio-visual and photographic archive.