If NASA only had fragments, then what was there to hide?

You mean you need that spelled out to you? Think about it a bit.

You and I are in a cold war, your satellite (secret or not) falls into my backyard.

Senario 1) I tell the world I have parts of your satellite, what do you do?
Senario 2) I tell the world that I found nothing it was a meteor, what do you do?

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Howling from the Shadows

It must be fun to lead a life completely unburdened by reality. --- JayUtah

You can't reason an irrational person out of an irrational belief. --- Noclevername

Apollo: The History and the Hoax
Enter the World of Athran