Dad taught me about duty when he told me about 18 friends going down in one night over Hanoi. He got as good a sleep as he could when he got back, and got in the plane the next day. Duty. To yourself. Your family. Your country. Your God.
Cant help but think of my ancestor (9th Grt Gramps) who stood at Concord Bridge. And later fought at Bunker Hill.
What it must of took to stand there against the most powerful nation on earth at that time.