UFO with right angle turn near San Antonio

Summary

A round, silver object was sighted on November 7, 1959, about 8 miles northwest of San Antonio, Texas. A worker at a quarry observed it for one minute, describing it as the size of a pinhead. The object made unusual movements, including an abrupt 90-degree turn toward the north before quickly disappearing. The witness saw it at the same time as Venus, helping to locate its position in the sky. Despite good flying conditions and several airports nearby, no clear explanation for the sighting was found.