Leslie Kean Journalist, author 2017 NYT article. 2010 book. Central figure in disclosure. Documents Imminent: Inside the Pentagon's Hunt for UFOsInside the U.S. Government Covert UFO Program — Volume 2: Initial RevelationsThe Secret Archives of Mystery WireUFOs: The Declassified InvestigationUFOs: Light on the Pentagon's Declassified Files Incidents Kecksburg Programs