In January 2006, Archives New Zealand released to the "Sunday Star-Times" newspaper a box of David Lange's previously classified documents. They revealed New Zealand's ongoing involvement in Western alliance espionage, and a threat by the United States to spy on New Zealand if it did not back down from its ban on nuclear ships. Archives New Zealand chief executive Dianne Macaskill said the paper did not have the authority to access or print the report, and wrote to the paper revoking permission to publish it. In response, the "Sunday Star Times" said the information had already been released into the public arena and hence could not be retracted. The release of the document prompted a high-level inquiry to investigate how the top-secret report ended up in Lange's personal papers, in breach of security protocol. A secret diplomatic cable released by WikiLeaks in 2010 covers the accidental release of the document.