Parcast Presents: Summer of '69

In 1949, the Air Force launched a new UFO research project: Project Grudge. But this time, they had a new mandate to follow: extraterrestrial UFOs did not — and could not — exist.  For more episodes like this one, follow Unexplained Mysteries. Every Tuesday and Thursday, unravel the stories behind history’s most compelling puzzles. Learn more about your ad choices. Visit podcastchoices.com/adchoices