Philip Klass

American journalist and skeptic (1919-2005), senior editor at Aviation Week & Space Technology for over 30 years. Became the most prominent UFO debunker of the 20th century, founding member of CSICOP. Authored multiple skeptical books including 'UFOs Explained' and 'UFO Abductions: A Dangerous Game.' Known for his 'Klass Curse' and aggressive challenges to UFO proponents. Maintained detailed files and correspondence with researchers on both sides of the debate.