Jon Wiener is an American historian and journalist based in Los Angeles, California. His most recent book is Set the Night on Fire: L.A. in the Sixties, a Los Angeles Times bestseller co-authored by Mike Davis. He waged a 25-year legal battle to win the release of the FBI's files on John Lennon. Wiener played a key role in efforts to expose the surveillance, as well as the behind-the-scenes battling between the government and the former Beatle, and is an expert on the FBI-versus-Lennon controversy. A professor emeritus of United States history at the University of California, Irvine and host of The Nation's weekly podcast, Start Making Sense, he is also a contributing editor to the progressive political weekly magazine The Nation. He also hosts a weekly radio program in Los Angeles.

The Freedom of Information Act, 5 U.S.C. § 552, is the United States federal freedom of information law that requires the full or partial disclosure of previously unreleased or uncirculated information and documents controlled by the U.S. government upon request. The act defines agency records subject to disclosure, outlines mandatory disclosure procedures, and includes nine exemptions that define categories of information not subject to disclosure. The act was intended to make U.S. government agencies' functions more transparent so that the American public could more easily identify problems in government functioning and put pressure on Congress, agency officials, and the president to address them. The FOIA has been changed repeatedly by both the legislative and executive branches.