UFO seen at Edwards AFB as balloon with light

Summary

A 1968 report describes a yellow, oval-shaped object seen at Edwards AFB, California. An observer described it as solid with fuzzy edges, about the size of a window. It rose in an arc toward the west for five minutes. The investigating officer noted that a control tower operator identified it as a balloon with a small attached light. Although there was no scheduled air activity, the most plausible explanation points to a balloon.