During World War II allied and German aircraft alike encountered balls of light operating dangerously close to their planes. As reports were filed each military insisted it was their adversary, which instilled the fear that they were falling behind in technology and could lose the war. Eventually, it became clear that these balls of light did not appear to be of this earth. Author Graeme Rendall writing for The Debrief covers the history of ‘Foo Fighters’ and how our military pilots are still encountering unknown entities. This is a fun article and you can check it out HERE.