News Wrap: Carbon Dioxide Level Hits Grim Milestone

Aired: 5/10/2013 | 0:04:53 | Clip
In other news Friday, the National Oceanic and Atmospheric Administration reported that carbon dioxide in the Earth's atmosphere has reached a level not seen in millions of years. Also, the new skyscraper at Ground Zero in lower Manhattan now stands at its full height. The new structure will be the tallest in the U.S.