North Korea has reportedly executed Defense Minister Hyon Yong Chol by antiaircraft guns. Reports say he was put to death in part because he was disrespectful to North Korea’s leader Kim Jong Un, doing things like falling asleep at military events. The reports come from South Korea’s intelligence agency but have not been confirmed and have raised as many questions as answers. Bruce Cumings, professor of history at the University of Chicago and author of Parallax Visions: Making Sense of American-East Asian Relations at the End of the Century, The Korean War: A History and North Korea: Another Country, joins us to discuss the latest news out of North Korea. PHOTO: AP- Ahn Young-oon -- South Korean men pass by a TV news program showing images published in North Korea's Rodong Sinmun newspaper of North Korea's ballistic missile believed to have been launched from underwater and North Korean leader Kim Jong-un, at Seoul Railway station in Seoul, South Korea, Saturday, May 9, 2015. North Korea said Saturday it has successfully test-fired a newly developed ballistic missile from a submarine in what would be the latest display of the country's advancing military capability. The letters on the screen read "The missile believed to have been launched from underwater near Sinpo".