Which of the following was NOT a proposed explanation by Allied aircraft pilots during World War II for the strange objects they called "foo fighters"?

The term "foo fighters" came into existence during World War II when Allied and Axis aircraft pilots reported being followed by strange metallic spheres, balls of light, and other unfamiliar shapes. Many of these encounters were photographed, but still, some proposed explanations included St. Elmo's fire, the planet Venus, and German secret weapons.

Asked by Rachel Bortles · Last updated 4 years ago · 893 views · SOURCE