Zapata's filing records with the U.S.Securities and Exchange Commission are intact for the years 1955–1959, and again from 1967 onwards. However, records for the years 1960–1966 are missing. The commission's records officer stated that the records were inadvertently placed in a session file to be destroyed by a federal warehouse, and that a total of 1,000 boxes were pulped in this procedure. The destruction of records occurred either in October 1983 (according to the records officer), or in 1981 shortly after Bush became Vice President of the United States (according to, Wison Carpenter, a record analyst with the commission).