PRI's The World: 12/30/2015

A Canadian woman whose son died fighting for ISIS says it's not easy to pinpoint which young people will be vulnerable to ISIS recruiters. Plus, we hear a story about a Korean model stuck between two worlds: Considered too big to strut the runway in Seoul but too skinny to be a plus size model in LA. But she's making her own way as South Korea's first plus size model. We also bring you a real-life ghost story. Actually, it's more of a super-natural experience. But fans of Sherlock on PBS will definitely want to give it a listen before watching Friday's new episode.