Doonesbury by Garry Trudeau for December 30, 1972
Man: You know, Neil sometimes I think I'm not really so well cut out for air duty over Vietnam...I'm not one of them bleeding hearts, mind you, but didja ever stop to think how much destruction we're responsible for? Man 2: Bombardier, we're over target. I'm goin' up! Person: Roger, cap'n. Man: So much for soul-searching.