The students in Kenya understood in the most visceral way the value of water. The misuse of natural resources during our age of climate change is unethical and inhuman. No matter your world view, water is special. Kids get this.

This week on "Inside the Vatican," we'll talk about some of the questions the pope emeritus' letter raises.

Pope Francis knelt at the feet of the leaders of South Sudan, begging them to give peace a chance and to be worthy "fathers of the nation."

This week on "Inside the Vatican," we cover the ecumenical retreat the Vatican is hosting for South Sudanese leaders.

The Vatican described the retreat as “a propitious occasion for reflection and prayer, as well as an occasion for encounter and reconciliation.”

Aboard the papal plane, Francis spoke with reporters about the need to build solidarity, not barriers.