Crash at Corona: The U.S. Military Retrieval and Cover-Up of a UFOAviation science writer Don Berliner and nuclear physicist Stanton Friedman, the original civilian investigator of the so called Roswell incident, have delved into the controversy to find the truth. They sifted through once classified government documents, interviewed military and civilian witnesses, pieced together evidence, considered alternative theories, and concluded that a UFO crashed near Corona and the U. S. government knew it and covered it