What's your verifiable, conclusive proof for the following events?

Edmund Hillary summits Everest.
D-Day Landings.
Julius Ceaser Conquers Gaul.
Mary Queen of Scots was Executed.
Germany invaded Poland in 1939
Sputnik 1 was launched in 1958
Charles Lindenberg flew the Atlantic
Scott made it to the South Pole.

You really aren't getting it. Aircraft debris is physically existing evidence that is physically indentifiable for proof of where it originated. Your standard of evidence seems to be that whatever is officially said to have happened is the indisputable truth.

And your prevailing attitude seems to be - Why should we doubt them or be concerned, simply because they fail to show the evidence they have in their possession that would conclusively prove they are correct?