The forties are the time when you begin to take notice of certain aches and pains. Your body and brain behave in inexplicable ways: Less hair on your head, more in your ears and nostrils. More memories in the bank, less synaptic firepower with which to access them. Gravity has started to show its inexorable pull.

When the Americans were trying to conquer the Navajos, they felt this need to capture Canyon de Chelly like it was the Navajo capital. It was a meeting place and a sanctuary of last refuge. To control Canyon de Chelly was to control the Navajo people.

I find there's a thin, permeable membrane between journalism and history, and though some academic historians take a dim view of it, I gather a lot of strength and professional inspiration from passing back and forth across it.

Americans have a profound longing for heroes - now perhaps more than ever. We need our explorers, our sports icons, our Medal of Freedom winners, our Nobel laureates. We need our Greatest Generation warriors, our 'Sully' Sullenbergers, our Neil Armstrongs. On some level, we still subscribe to the myth of the man in the white hat.