New analysis finds parts of the U.S. have already warmed close to critical 2-degree level

Summary: For years, scientists have warned that we need to stop the planet from warming an additional two degrees Celsius above pre-industrial levels to avoid catastrophic problems. But a new analysis by The Washington Post finds many major areas across the U.S. have already reached that mark. The Post's Chris Mooney joins Amna Nawaz to discuss why some parts of the country are affected more than others.