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Not only does he violate Dan Froomkin's rules (http://www.salon.com/opinion/greenwald/2007/02/10/iran/index.html), he forgets his profession's Code of Ethics. Here are a few relevant statements (Full text here: http://www.spj.org/ethicscode.asp?):
Seek Truth and Report It Journalists should be honest, fair and courageous in gathering, reporting and interpreting information.
— Test the accuracy of information from all sources and exercise care to avoid inadvertent error. Deliberate distortion is never permissible.
— Always question sources’ motives before promising anonymity. Clarify conditions attached to any promise made in exchange for information.
— Support the open exchange of views, even views they find repugnant.
Act Independently Journalists should be free of obligation to any interest other than the public's right to know.
— Be vigilant and courageous about holding those with power accountable.
Be Accountable Journalists are accountable to their readers, listeners, viewers and each other.
— Clarify and explain news coverage and invite dialogue with the public over journalistic conduct.
— Encourage the public to voice grievances against the news media.
— Abide by the same high standards to which they hold others.
(Congratulations, Glenn!)