Mudlarkers uncover archaeological treasures along rivers

The phrase "One person's trash is another's treasure," certainly applies to author Lara Maiklem. She is what's known as a "mudlarker" and spends her spare time scouring the shores of London’s River Thames for artifacts. Maiklem wrote a best-selling book explaining her passion for this unusual pastime. Special correspondent Malcolm Brabant joined her down in the mud.