Mexico City, Mexico (Secretaría de Economía Nacional)

On March 19, 1950, Miguel Angel Garcia Macias, a pianist, composer, and self-described ideographic inventor from Veracruz, Mexico, wrote to the President of the Commission of Scientific Investigation of the United States of North America in New York, describing his concept of stratospheric aerostats and attributing flying saucers to U.S. atomic technology. The letter, translated by Mrs. Sophia Saliba, was received by the FBI New York Field Office by April 7, 1950, and filed under case 62-HQ-83894, Serial 220.