Mark H. Gaffney is an environmentalist, peace activist, researcher, and the author of The 9/11 Mystery Plane and the Vanishing of America, The First Tree of the Day, Gnostic Secrets of the Naassenes and Dimona, the Third Temple? His articles and essays have appeared in numerous journals, magazines, and newspapers. Mark holds a B.S. degree in physical science from Colorado State University. He lives in Chiloquin, Oregon. Mr. Monaghan holds a Bachelors degree in electronic engineering and is a Freedom of Information (FOI) researcher of records regarding the 9/11 attacks.

Government 9/11 records found by Monaghan were reported by Las Vegas SunTimes News Group, KLAV AM, and the documentary Loose Change: An American Coups. Monaghan is also a panelist of the Consensus 9/11 group. His 9/11 research includes two peer reviewed studies.