This is one you probably didn't hear in public school. On the evening before our D-Day invasion (which was on June 6, 1944), FDR offered this prayer over a national radio broadcast. It's very moving, and in this video there are some very tasteful photos attached.
Fox News Sunday recently did a nice little segment on The United States Marine Band. They interviewed Col. Michael Colburn (former euphonium soloist with the band).
The player below offers you samples of Marine Band recordings that you can download from Amazon, either as individual songs or entire albums.