WTF happened in 1947?!

• Cold War started.

• Roswell Crash - UFO's in general become main stream starting in June 24th, July 4th and Roswell July 7th, also first recorded men in black reports.

• CIA formed through National Security Act as well as Department of Defense

• Air Force pilots hit speed of sound for first time

https://en.wikipedia.org/wiki/1947_in_the_United_States#Events

Operation High Jump also took place between 46 and 1947

The largest expedition in Antarctica to that point

https://www.antarctican.org/the-land-secret