The fact is that there is no AMI anthrax letter.
Yes, and the evidence says that is because it was thrown away. But, to you and you alone, it means it never existed.
Clearly, you see your beliefs as the only proof of anything. If you believe it, then it must be true - regardless of what the facts say.
And, you've made it very clear in this thread that there isn't any fact or testimony that can change your mind.
End of story, I guess.