Bill Clinton; CGI Climate Summit; Juan Manuel Santos

Bill Clinton, former president of the United States and founder of the Clinton Global Initiative, talks about his presidency and comments on the challenges facing the U.S. today. Gina McCarthy, administrator for the U.S. Environmental Protection Agency, David Crane, president and C.E.O. of NRG Energy, and Jose Maria Figueres Olsen, former president of Costa Rica, reflect on the actions needed to combat global climate change. Juan Manuel Santos, president of Colombia, discusses the efforts the country has made towards conflict resolution.