Go to this Amazon page, and read some of the reviews of her book. She undoubtedly met Plame the flame years ago.
http://www.amazon.com/exec/obidos/tg/detail/-/B0000667EX/qid=1129993643/sr=2-1/ref=pd_bbs_b_2_1/102-1249388-8049728?v=glance&s=books
If it doesn't open, just plug Judith Miller into the amazon search window.
You mean this review?
"Now We Know How Judith Sourced Plame, October 19, 2005
Reviewer: D. Less (United States) - See all my reviews Great Book!
Now we also know who Judith's sources for Valerie F(P)lame was.
The CIA, maybe her team or maybe Val herself.
She interviewed Ms. Plame's own group at the CIA to write this book. In DC, that's all it takes...."
Thanks for the link!