Here is a link to a video of that Mass. If you have the patience, look carefully at 44.48 in the video and there you will see a very young man, who is yours truly.
Here are a few photos of that day. This first one shows the 400-voice "papal choir" behind the Holy Father.
Here is an aerial view of Boston Common.
This was my first glimpse of the Holy Father.
The pope spent the night on the campus of Saint John's Seminary and the next morning, we seminarians walked down to the field where the helicopter awaited to take the pope to New York City, for his address to the United Nations. I was standing about five feet from him when he looked at us and promised he would be back. He extended his hands to us and a photographer snapped the following photo. It was later re-touched and the background of the seminary grounds was removed.
Today, as I remember those feelings and the joy I felt about my Catholic faith, I must admit that that spark is alive once again through the person of Pope Francis. Who would have known?
Gotta sing. Gotta pray.