If the story fits their agenda they do not care about the truth.
Some stories are too good to check. If they checked this woman out and it turned out her story was fraudulent, they would not have had a hammer to back the President with. The only surefire way to prevent this is to not check the story, and print whatever lies anybody might feed you, as long as it supports your agenda.
Meanwhile the documentary evidence coming out of Iraq showing an Iraqi connection to 9/11 "may have limited evidentiary value"...