"After years of study and personal on-site investigation of UFO reports, I am certain that there is more than ample high-quality observational evidence from highly trained and reliable lay witnesses to indicate that there are unidentified machine-like objects under intelligent control operating in our atmosphere. Such evidence in some cases is supported by anomalous physical effects upon the witnesses, electrical devices, and the environment, as well as by instrumentation such as radar and Geiger counters."