New research shows Americans living in Colorado, Virginia, and Arizona take the most vacation time from work. The advocacy group "Project: Time Off" found people in those states are taking more than the national average of around 17 days off. Residents of Montana, Delaware, and Rhode Island take the least time off. John Tierney is a contributing science columnist for the New York Times. He joins "CBS This Morning" to discuss what his research has found about how to make the most of your vacation.