On Sunday, there were many letters to the editor regarding gun control. All of the authors did not know the difference between an "assault rifle" and a "semi-automatic rifle." An assault rifle is a rapid-fire, magazine-fed automatic rifle designed for the infantry. They are illegal in the U.S.A. Whereas, a semi-automatic rifle is a rifle able to fire repeatedly through an automatic reloading process, but requiring release and another pressure of the trigger for each successive shot. They can be legally sold in the U.S.A. I hope people who write to the editor respect this critical difference in the future.