A new CBS News/New York Times poll shows 66 percent of Americans say the U.S. should join an international treaty to reduce global warming
Nearly 150 world leaders are meeting in Paris for the largest-ever climate change summit. A new CBS News/New York Times poll shows 66 percent of Americans say the U.S. should join an international treaty to reduce global warming. Margaret Brennan reports from Paris, where security concerns threaten to overshadow the talks.