Bill O'Reilly has his own security people so he knows virtually nada darned thing about this subject. He apparently thinks that he is expert in every area and of course he can weigh in and monopolize the conversation on his show so that makes him a legend in his own mind. Sometimes he is right. Not all of the time and this is one time that he is wrong. If he was trying to say that all semi automatic weapons should be registered with the FBI, that would be dumb. With all that is circulating and that will never be documented now, due to gun theft's, selling by legal owners to folks who in turn re sell to folks who are not licensed, etc, the FBI could not hold all the information in their computers.