"the Nazi SS had been successful in establishing remote bases of operations in Antarctica and South America to continue the secret development of flying saucer technologies, which in 1952 began overflights of major U.S. cities to intimidate the Truman administration into capitulating into Nazi SS demands.
In May 2015, Goode described how the Nazis had overflown the U.S. capitol in 1952 with their superior technologies, and pressured the Truman and Eisenhower administrations into negotiating a secret agreement:"
https://exopolitics.org/nazi-ufos-flew-over-washington-led-to-ss-infiltration-of-us-space-program/
"This secret agreement was signed on August 11, 1950, among others, by U.S. Presidents Harry S. Truman and his successor as President of the United States, Dwight D. Eisenhower, Chiang Kai-Shek, Mao Tse Tung, Tschu Enlai and Generalissimo Franco of Spain."
http://mslv.gr/bilateral-minesfield-breakthrough-successor-agreement/
Eisenhower's Warning about the Military-Industrial Complex