This book introduces a brand new field of scientific research based upon analysis of artifacts retrieved from crashed and damaged UFOs that have come down in Russia and America. For the first time, it reveals the scientific principles behind UFO propulsion dynamics, and shows that these principles are known and recognized by today s physicists. Potter s analyses of these UFO mechanisms are substantiated with references to a broad array of over 300 research papers published in scientific journals Potter correlates many of the phenomena observed firsthand by close encounter witnesses and...