i earlier spoke to law professor, david coppell, research director of independence institute and author of the book, the truth about gun control. david coppell, good to have you with us. new calls for gun control in the wake of las vegas. i want to take these arguments, based on what we know one by one. start with automatic weapons, if stephen paddock had automatic weapons that was illegal under the law, correct? >> yes. 1986 federal law said no new automatics can be sold to anyone in the public. ever since 1934 even owning a old one has been process that requires about nine months to get federal permission to do so. okay. let'slet's go to semiautomatic weapons, fire single pull of the trigger with unshot. he had a lot of those apparently including ar-15s which are a popular form of semiautomatic