While there might be reported instances of griffin use, that was a result of a few 'bad apples', and there's no paperwork proving we authorized it. Any attempt to find such records would be a partisan witchhunt that helps the terrorists. Besides, Jack Bauer didn't hesitate to use griffins in Season 2 of 24.
You heard her, he would have been there but there was some important vacuuming he had to do.
Also: that's my favorite running gag with this series of videos.