1954-10-11 — Upper Marlboro, Maryland

On 11 October 1954, a single round unidentified object yellow in color changing to red was observed flying upward in a northwest direction over Upper Marlboro, Maryland. Object size compared to a basketball with no aerodynamic features, leaving a small red trail. Estimated speed 3 mph and altitude 8,000 to 10,000 feet. Object remained in sight for approximately 10 minutes. Observed by a civilian witness along with several neighbors. Visual ground observation only, no instrumental or electronic equipment used. Local weather checked, no balloons reported.

extracted via: llm_subagent_v1