The AP is trying to figure out why pro self defense advocates such as myself point out "errors of fact" when the news service uses the phrase "assault rifle" to describe incidents where a semi-auto competition rifle is used.
Check out the piece at Alphecca, where the AP essentially blames the BATF for the news services' confusion on the matter.
The reality is, if the editors and reporters would just learn something about the subject they love to cover with inflammatory language . . . well, people just might take them more seriously.