She is an Operative in the CIA and was instrumental in sending her husband Joseph Wilson (Former AL Gore employee) to Niger for this all important highly sensitive investigation on Uranium sales between Niger and Iraq.
Joe Wilson went to Niger and asked Terrance J. Wilkiinson if he knew if Niger was selling "Yellow Cake" to Niger but he said he was unaware of any such things happening :-) Joe Wilson then asked Greg Packer if he knew of any such sales and he said no as well. So Joe Wilson has come to the conclusion that George W. Bush is a liar and Joe Wilson decided it was time to write an OP-ED for the NYT's and the shiite has hit the fan.
P.S. the last paragraph can be verified by Doug Thopson of Capitol Hill Blue :-)