For those curious why this appears on Science Fiction Fan sites, it's referred to in John Ringo's book "Manxome Foe." You have to Google it and find the slide show of the military in Iraq accompanied by the BYU university singers to understand how it fits into the plot. And yes, the main characters both cry, even the "space marine." I teared up myself when I found the link on Youtube. It tied right in with the space marine on a long tour in the USA's first spaceship, when only 5 of 41 marines returned alive from their previous tour of duty, and his girlfriend knows that.

Best link I've found with the lyrics included is http://www.mypeacelovehappiness.com/military/homeward_bound.html