Why did the Panama Canal get a $5 billion facelift?

The Panama Canal, a century-old shortcut connecting the Pacific and Atlantic oceans for global trade, carries a third of the trade from Asia to the Americas. Tomorrow, the 50-mile canal will open after nine years and a more than $5 billion effort to widen the waterway. David Brancaccio, host of The Marketplace Morning Report from American Public Media joins Alison Stewart to discuss.