The U.S.-Mexico border is one of the world's most fortified international divides. Starting Wednesday, it will also be one of the world's only boundaries with an airport straddling two countries.
An investor group that includes Chicago billionaire Sam Zell built a sleek terminal in San Diego with a bridge that crosses a razor-wire border fence to Tijuana's decades-old airport. Passengers pay $18 to walk a 390-foot overpass to Tijuana International Airport, a springboard to about 30 Mexican destinations.
