CLAIM-998046reported
“At 8:27 p.m., Evans and Biddle were on the mesa and heard a strange sound from the tree line to the southeast. The sound occurred ten times and sounded like the screech of a baboon; Anderson, positioned at the East Gate, also heard it.”
Inside the U.S. Government Covert UFO Program: New Insights
SRC-002150 · uploaded PDF p. 212; printed p. 204; October 14, 2009