The wife of the iconic TV host spoke to ABC News about life after her husband's cancer diagnosis and how he maintains a positive frame of mind. WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT:
http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU:
https://hulu.tv/33iKepm #WorldNewsTonight #DavidMuir #AlexTrebek
