Earth Hour

Earth Hour is TODAY, Saturday, March 29 from 8 - 9 p.m. EST, and it looks like it's going to be really big this year. So far 25 cities around the world are taking part, including Atlanta, Chicago, Phoenix and San Francisco in the U.S. Landmarks like the Golden Gate Bridge, Sears Tower, and the Sydney Opera House (Australia) will dim during Earth Hour. Millions of people around the world are joining together to make a statement about climate change by turning their lights off for an hour.