The mention of Carmen Dragon's arr. came up in another discussion thread. I found this link below on another forum (too bad I didn't find it a few days ago closer to July 4th). This is the Iowa All-State Chorus and Band in 2012 with Dr. Jerry Blackstone (MI) conducting. Looks to be over 200 in the band and reported as 600 in the choir. Very well done!! Excellent balance and good intonation and... the trumpets didn't over do it in the last few measures.
America The Beautiful - Iowa All-State Chorus and Band 2012
A little known fact is that Carmen Dragon is/was Daryl Dragon's father. Daryl was the Captain in the pop duo, "Captain and Tennille" from the '70s.