With warm thanks to Jason Kaufman for his superb guidance and insightful editorial skills; Blythe Brown for her tireless research and creative input; my good friend Jake Elwell at Wieser; the National Security Archive; the NASA Public Affairs Office; Stan Planton, who continues to be a source for information on all things; the National Security Agency; glaciologist Martin O. Jeffries; and the superb minds of Brett Trotter, Thomas D. Nadeau, and Jim Barrington. Thanks also to Connie and Dick Brown, the U.S. Intelligence Policy Documentation Project, Suzanne O’Neill, Margie Wachtel, Morey Stettner, Owen King, Alison McKinnell, Mary and Stephen Gorman, Dr. Karl Singer, Dr. Michael I. Latz of Scripps Institute of Oceanography, April at Micron Electronics, Esther Sung, the National Air and Space Museum, Dr. Gene Allmendinger, the incomparable Heide Lange at Sanford J. Greenburger Associates, and John Pike at the Federation of American Scientists.

The Delta Force, the National Reconnaissance Office, and the Space Frontier Foundation are real organizations. All technologies described in this novel exist.

If this discovery is confirmed, it will surely be one of the most stunning insights into our universe that science has ever uncovered. Its implications are as farreaching and awe-inspiring as can be imagined. Even as it promises answers to some of our oldest questions, it poses still others even more fundamental.

—President Bill Clinton, in a press conference following a discovery known as ALH84001 on August 7, 1997