So there was this man named Eugenio Pacelli who lived in Italy a long time ago. People called him Pacelli for short. He was a really important man because he was the leader of the Catholic Church, which is a big organization that helps people around the world.
In 1936, Pacelli decided to go visit the United States, which is a big country across the ocean from Italy. He wanted to meet some very important people who were leaders of the United States, and also talk to regular people who lived there.
When Pacelli arrived in the United States, he was greeted by lots of people who were excited to see him. There were even big parades and celebrations in his honor!
While he was in the United States, Pacelli did lots of things. He visited lots of cities and met with lots of important people, like the President of the United States. He also gave lots of speeches and talks to people who wanted to hear him speak.
Pacelli's visit was really important because it helped people in the United States and Europe understand more about each other. It also showed how important the Catholic Church was to people all around the world. Overall, it was a really big deal and lots of people still remember it today!