How to Add country and City to the Globe?

How to Add country and City to the Globe?

**I want to show various stories on the Globe segregated by country and city .So first I need to display the country and city which I am interested to show on the globe ,So how can I add a country/city and it should be clickable, When one country/city is clicked it must show list of stories related to the country/city and when the particular story is clicked the full story must be displayed **

Have you seen the code examples on Sandcastle (https://sandcastle.cesium.com/index.html?) ? You should be able to piece some of this functionality from these examples.