Live in Times Square, this is Good Morning America.

Good morning America. Happy Sunday to you.

Happy Mother's Day to you.

A special Mother's Day to our Mamas, Miss Tammy, Sharon, and Lourdes,

and our mother-in-laws, yes, and all the moms out there.

Happy Mother's Day to you.

Oh, thank you guys.

Thank you so much. It was a special day, a special day. We also have a lot of news on this Sunday,

including signs of a possible breakthrough in President Trump's trade war. The president saying

great progress was made between American and Chinese officials holding tariff talks this weekend in Switzerland.

We're going to have that.

But we do begin today in the Vatican.

Vatican City, Pope Leo the 14th, delivering his first Sunday prayer as leader of the Roman Catholic Church.

ABC's Terry Moran is there. Terry, good morning to you.

Good morning, Witt.

It's a festive scene here at St. Peter Square, the Pope's first Sunday prayer, as you said.

In the early days of every papacy, tell a story that the whole world wants to hear.

Who is the new Holy Father? For Pope Leo so far, it's a story of both continuity and change.

Deus qui per...

A special moment in St. Peter's Square this morning,

Pope Leo the 14th leading the first Sunday prayer of his papacy.

Thousands came to pray with him.

...