UFO seen and exploded in San Bernardino

Summary

A 1968 document describes a sighting of an object in the sky that exploded. The witness described it as a comet or something similar. No photos were taken and there was no physical evidence. The official conclusion was that there was insufficient data for evaluation, likely a weather-related phenomenon. The observer wrote directly to President Johnson, who asked her to fill out a questionnaire for further details. The case was archived without a clear explanation.