See Group of Army Musicians, The Six-String Soldiers, Perform Beatles Classic
When I was growing up and playing Army in the backyard, I carried an M-16, not a banjo. That being said, it's great for morale to have a group of talented musicians like the Six-String Soldiers entertaining you at various points abroad.
Take a look (and listen) at the Six-String Soldiers at last month's Joe Val Bluegrass Festival in Boston as they take on a Beatles classic.