RAF Spitfire pilots in WWII during the Battle of Britain. Life expectancy: perhaps 10 sorties.* Impact: "Never in the field of human conflict have so many, owed so much, to so few ..."
I rest my case.
(*One Google reference claims the life expectancy was 45 minutes of flight time.)
(Tom insists he is not old enough to have taken the picture of the Spitfire himself.—Erik)
Before blogging became all the rage, Tom was posting book reviews and Observations (essentially early blog posts) to this site. You can find the archives below.
What we're talking about
on the front page.