Before revision: This list was compiled from famous cover-ups such as Watergate Scandal, Iran-Contra Affair, My Lai Massacre, Pentagon Papers, the cover-up of corruption in New York City under Boss Tweed (William M. Tweed and Tammany Hall) in the late 1800s ,Ackerman, K. D. (2005).
After revision: This list was compiled from famous cover-ups such as Watergate Scandal, Iran-Contra Affair, My Lai Massacre, Pentagon Papers, the cover-up of corruption in New York City under Boss Tweed (William M. Tweed and Tammany Hall) in the late 19th century ,Ackerman, K. D. (2005).