If not for truckers, we wouldn’t have food in our grocery stores, fuel in our cars or the ability to move an entire house worth of stuff across the country. Finn Murphy has logged more than a million miles back and forth across the United States driving trucks. He joins us to talk about all those hours at the wheel, which he writes about in “The Long Haul: A Trucker’s Tales of Life on the Road” (W.W. Norton).