i want to bring in professor mike mochizuki who is the u.s. chair at george washington university. professor, thank you for joining the newshour. watching that astonishing video of shinzo abe being assassinated. a long serving world leader taken down by a couple of shots from a homemade gun in a country that has almost eliminated gun violence. what is your reaction and what of the repercussions? prof. mochizuki: first of all, i want to express my deepest condolences to prime minister abe's family, friends, colleagues, and the entire japanese nation. this is indeed a horrible tragedy. a shocking development for the country that does not experience this kind of violence. this will be forever etched in the memory of the japanese. i think one of the things that is important to note is that we don't have much in terms of gun violence because handguns are completely banned. at the same time, over the last few decades, attacks on japanese politicians have not been that rare. so, this will cause the japanese, i think, to become much more vigilant abou