• BIG, BIGGER, BIGGEST: VIDEOS

  • Saturday 31 July at 2:00PM
  • National Geographic Channel
Please enable Javascript!

Apocalypse Sub

A look at the US Navy's biggest submarine, the USS Pennslyvania.

THREE MINUTE TEASER

All Videos
  • Apocalypse Sub video

    »  Play Apocalypse Su... video  (1:51)

    A look at the US Navy's biggest submarine, the USS Pennslyvania.

  • Oil Rig video

    »  Play Oil Rig video (1:24)

    Revealing the technological leaps that have enabled the construction of the world's biggest oil rig.

http://media.natgeotv.com/Shows/1021.jpg
National Geographic Channel