What this year's record-breaking heat means for sea levels

The scorching heat wave that stifled Europe recently is now moving north, but it continues to set alarming records. Temperatures in Greenland are running 15 to 20 degrees Fahrenheit above average -- melting about 10 billion tons of ice into the ocean daily. William Brangham talks to Ted Scambos of the Cooperative Institute for Research in Environmental Sciences about the frightening phenomenon.