The Tuck Letter (1970): Early Official Interest in Atmospheric Vortex Phenomena and Its Implications for Quantum Gravitodiamagnetic Hypotheses

We report the discovery of a declassified U.S. government document — a letter dated December 16, 1970, signed by James L. Tuck, Manhattan Project physicist and senior figure at Los Alamos National Laboratory — in which Tuck explicitly requests from the U.S. Army Engineering School at Fort Belvoir information concerning the production of "large atmospheric vortices," citing the Scientific Study of Unidentified Flying Objects (Condon Report, 1969) as his source. This document constitutes, to our knowledge, the earliest known instance of a senior government physicist formally linking UAP-associated atmospheric phenomena to structured experimental inquiry through official military channels. We situate this finding within the quantum gravitodiamagnetic framework proposed in the preceding documents of this series, and argue that the Tuck letter provides independent historical support for the physical reality of anomalous vortex phenomena. The letter was released publicly on May 22, 2026, as part of Release 02 of the PURSUE program, under catalog identifier DOE-UAP-D002. All claims are drawn from verified primary and secondary sources. This document is part of a five-document series. Companion documents: minimum experiment (Doc1), full technical proposal (Doc2), plain language summary (Doc3), and convergence study Tuck-McDonald (Doc5) available in the same Zenodo repository.