PBS
Pbs Learning Media: The Tunnel Challenge
This interactive activity, from the Web site developed for the PBS series "Building Big," explores tunneling and the tools and methods used to do the job.
PBS
Pbs: Who Builds Big
Who Builds Big? Learn about careers in engineering and architecture. Scroll to the bottom for more links in this PBS series to find about individuals who build bridges, domes, skyscrapers, dams, and tunnels.