Oh you know the answer to that one. They were hoping like hell that the story would hurt the President and stop his apparent re-election!
One guess is that Stolen Honor was scheduled to be reviewed/discussed on September 9. This is the first instance of a large group of POWs against Kerry--a group that was not, contrary to what MSNBC said in the first five minutes of Hardball, a 527. Their testimony would normally be extremely difficult to discredit; so the best way not to have to discredit is not to air -- due to some other breaking story.