“What Makes Heroes, Lieutenant?”

At the end of the Combat! episode "The Medal", Saunders asks a very important question: "What makes heroes, Lieutenant?" (the title of this post). Lieutenant Hanley's answer, I'm sure, is meant to get the audience thinking: "You tell me, Sergeant."

Now I'm sure Hanley realizes he's talking to a living embodiment of heroism at the moment - because Saunders is a great example of a hero - but let's back up for a minute. What, exactly, does make heroes? It's something I've considered many tim...