Gunnery Sgts. Shawn and Janet Angell are swingers, and it cost both of them their Marine Corps careers. In this week’s cover story, they speak candidly about their lives, inside and outside the Corps. But they are just two of 10 enlisted Marines who found themselves caught up in a massive investigation at Officer Candidates School, the Quantico, Va.-based proving ground for all who earn the title Marine officer. The 2011 investigation led to accusations of sex with subordinates, adultery and group sex. In all, 10 Marines were court-martialed. Only one was acquitted. Read the full story in this week’s…