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Dirty Great Machines

Titans of Tunneling

Season 1 Episode 1
Take a trip underground to get up close and personal with titans of tunneling: the biggest, baddest tunnel machines on the planet. These monsters dig deeper & faster than ever before, gouging holes in the Earth’s crust for subways and sewers.
  • 44 min
  • TV-PG
  • Premiered 08/03/2015