Codenamed "Baneberry", an errant underground nuclear test at the Nevada Test Site exposed 300 site workers to radiation— the largest number of test site workers to that time— after sending up a plume of radioactive dust 8000 feet high "U.S. Nuclear Test Leaks Radiation, 600 Evacuated— Largest Number of Workers Ever Exposed", Pittsburgh Post-Gazette, December 19, 1970, p1 .