How did going to prom get so extravagant?

Prom season is just around the corner and these days it can become an all out, high priced extravaganza. There are elaborate "prom-posals" for asking a date to the prom, and dresses are more expensive than ever. For a closer look, KCBS News Anchor Scott Cohn spoke with Jay Zagorsky, professor at the school of business at Boston University and creator of the Prom Index. Getty Images / Bethany Clarke