Unprecedented Arctic Ice Melt in 2012 (Video)

In 2012 the Arctic ice cap shrunk more than ever before in recorded history. As of September, 2012, only slightly more than 20 percent of the Arctic Ocean was covered by ice. In this video Ray Suarez talks to Walt Meier, a scientist at the U.S. National Ice and Snow Data Center about the new evidence and how a lack of arctic sea ice affects ocean currents and changes weather patterns.