I Don't Know, But I've Been Told

I don't know but I've been told (I don't know, but I've been told) Air Force wings are made of gold (Air Force wings are made of gold) I don't know, but it's been said (I don't know, but it's been said) Army wings are made of lead (Army wings are made of lead) Sound off U.S. Louder Air Force! Bring it on down U.S. Air Force U.S. Air Force!