Economists, typically baffled by selflessness, have tended to hunt for hidden self-interest in apparent altruism.

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But as we mark the anniversary of September 11, we remember what remains the same: our character as a Nation, our faith in one another, and our legacy as a country strengthened by service and selflessness.

WHITEHOUSE: The White House

But such bravery and selflessness do not go unnoticed by senior officers.

BBC: UK forces' Operational Awards honour battlefield bravery

So what do you believe is a possible methodology which governments, rather yours or any other governments in the world, they can adopt to basically incorporate the human core values, the moral values of selflessness, brotherhood, over the materialistic frame of thought which people work by today?

WHITEHOUSE: Town Hall with Students in Mumbai