Google it :CIA’s Brennan a muslim Convert
This is but one of the pages.
There are several others. It seems no one knows for sure, but no one has denied it anywhere that I can find.
I suppose you have to make up your own mind, but it would appear that if it wasn’t true he would certainly speak up.
Oh, that’s right, I remember some discussion of this a few weeks ago! Sorry to bother you. That is quite troubling.