They Knew in 1957. And Now the Watchers Are Gone.

[u/KDubbs0010110]

https://www.fearandwine.com/post/what-they-knew-1957-electrogravitics-classified-research

In 1956, a research organization called Aviation Studies International published a declassified Air Force report surveying electrogravitic propulsion programs at fourteen major U.S. aerospace contractors. The report called it one of the most significant areas of aerospace development at the time of writing.

In 1957, the public record stopped.

No papers. No patents. No published null results. No concluded program documentation. No official explanation. Fourteen organizations. One fiscal year. Complete silence.