​Calendar: Week of September 14

Here's a look at the week ahead on our "Sunday Morning" Calendar:

On Monday, the National Book Foundation begins a week-long series of daily announcements of contenders for this year's National Book Awards, beginning with Young People's Literature.

Tuesday sees the opening in New York of the U.N. General Assembly's 70th Session.

Wednesday's the day for the second Republican Presidential Debate, to be broadcast on CNN, with separate rounds for first-tier and second-tier candidates.

Thursday sees the annual Ig Nobel Prize award ceremony at Harvard University, honoring scientific achievements that the sponsors say make people first LAUGH, and then THINK.

Friday is National POW/MIA Recognition Day, honoring all American service members who have been prisoners of war, as well as those still listed as missing.

And on Saturday, Pope Francis arrives in Cuba for an official visit, before flying on to the United States.