World Youth Day happens each year around the world. It was started by Pope John Paul II. Every few years they have a huge gathering of the youth in one country. In 2002 it was held in Toronto, Canada. I joined my sister's group that was coming from Okinawa, Japan. There was a group going from my home diocese, but it was going to cost $1800. My trip cost about $400. The difference? No fancy tour bus and a hotel. We stayed with a host family and relied on public transit. I met my sister and the youth she brought at our host church in Misasaga, Canada. It's a small town outside of Toronto.
The students didn't bring a country flag with them and felt out of place since all these other groups had a flag. Even though they were all military kids they didn't want to get an American flag since they were coming from Okinawa. We finally found a Japanese flag and they wrote "Archdiocese for the Military Services."
While walking around the main exhibit area we were approached by a man from Japan. He inquired about our flag. Turns out that the Japanese and Vietnam Catholics fly a different country flag when they are at events like this. It's a way to know they are not enemies with each other. They have a national flag that's also a religious flag. The things you learn.