Except for the eyewitness accounts, warnings from Herbert Hoover and William Randolph Hearst, newspaper ads, a touring story called 'We Will Never Die' with Hollywood stars...
I should have posted: "it's obvious that as of today, June 13, 1943 only those directly involved, at the highest levels in Nazi Germany knew the full extent of the "Final Solution".
This particular news report, on page 8 above, came from the Swedish-language Jewish Chronicle published in Stockholm.
It talks of "thousands" being "gassed to death in hermetically sealed barns" -- words which sound odd to our ears, since the actual numbers were already approaching not thousands or even tens of thousands, but hundreds of thousands, even millions gassed, and not in "hermetically sealed barns", but in purpose-built gas chambers.
So it's obvious that even in June of 1943, even some of those best informed did not yet realize the full scale and extent of the Holocaust.