Did Buffett Make a Safe Bet on the Future of Railroads?

Warren Buffett is spending $34 billion on the Burlington Northern Santa Fe Corporation, in what he calls "an all-in wager on the economic future of the United States." The nation's largest rail transporter of coal and grain, the BNSF is a link for consumer goods from Asia to the ports of Southern California to the rest of the country.  Aaron Gellman, Professor of Management and Strategy at the Kellogg School of Management and the Transportation Center at Northwestern University, says the implications extend far beyond America's railroads.