World leaders converge on the United Nations in New York this week for the 66th annual session of the General Assembly. Of 193 member nations, South Sudan being newly inducted this past July, 121 heads of state and government are expected to attend the six-day event.

We're helping break down the week's events to give you a viewer's guide to key topics this week.

Our GPS blog breaks down the top five stories on the agenda this week in New York, ranked in descending order of likely media interest. And our Security Clearance blog provides a viewer's guide to the events listed below:

MONDAY

The U.N. kicks off events with a two-day first-ever high-level meeting on noncommunicable diseases that cumulatively kill three in five people worldwide. It will focus on combating cardiovascular disease, cancer, chronic lung diseases and diabetes. U.N. Secretary General Ban Ki-moon is looking to "broker an international commitment that puts noncommunicable diseases high on the development agenda."