Season 21, Episode 3
Season 21 Episode 2103 | 28m 49s
Boat Building - See how a group of complete amateurs come together to hand-build a boat in just one week. Six Gill Sharks - One of the world's largest sharks has taken quite a liking to a busy northwest bay. Tsunami Update - Research shows the tsunami risk is far more severe than scientists previously thought.
Aired: 10/21/09Video has closed captioning.