Shark Attacks and Sightings Continue to Rise

This year's Shark Week on the Discovery Channel comes as shark attacks and sightings are growing across America. The channel is showcasing how infrared technology is being used to search for the world's most dangerous sharks. Paul de Gelder knows sharks better than anyone. In 2009, de Gelder was attacked by a massive bull shark that was under him. The shark attack caused him to lose his arm and leg.