The Bush said the media was being put through a "filter."
Something is happening that is preventing the "good news" from getting out of The Iraq.
The media never reports school board, community level events, and, generally, even city-wide events are rarely reported in distant places. "School Gets Paint Job" doesn't make it into the national news.
If there are no WMD, and there is no Al-Qaeda link, then the violent deaths of American soldiers are signicificantly tragic, rather than just "to be expected."