In time,railroads became the most popular form of land transportation in the United States.

VOA: special.2010.01.11

(Speaking) Institute director Eric Leonhardt says he's had his eye on the dairy herd as a source of transportation fuel for a long time.

VOA: standard.2010.02.23

There are so many people trying to help." That includes American fans who have come forward to donate coaching time, a gym membership, new skis and transportation.

VOA: standard.2010.01.22