If there was a flying saucer in germany at the end of ww2.
If that saucer was too large to transport via conventional means…
If that saucer was to have a new home in the usa, a base would need to be constructed to house and test it secretly. That would take time.
If that saucer was flown to the us in 1947 but crashed on the way there….
A cover story would need to be invented….
If aliens dont exist it would be necessary for the cia to invent them.
lol