Foo Fighters or Kraut Fireballs

The term foo fighter was used by Allied aircraft pilots in World War II to describe various mysterious aerial phenomena seen in the skies over both the European and Pacific Theater of Operations. The first sightings occurred in November 1944, when pilots flying over Germany reported seeing fast-moving round glowing objects following their aircraft. The objects were described as fiery and glowing red, white, or orange. Some pilots described them as resembling Christmas tree lights and fireballs, as big as 300 feet and as small as 1 foot. The foo fighters could not be outmaneuvered or shot down.

The military took the sightings seriously, suspecting that the mysterious sightings might be secret German weapons, but further investigation revealed that German and Japanese
pilots had reported similar sightings. During war time the term foo fighters became commonly used to mean any UFO sighting. Many people have speculated extraterrestrial involvement. During WWII, these experiences were taken very seriously. Accounts of these cases were presented to heavyweight scientists, such as David Griggs, Luis Alvarez and H.P. Robertson. The phenomenon was never explained. Most of the information about the issue has never been released by military intelligence.