years of living dangerously" with the best selling author thomas friedman and climate central's heidi cullen. plus, a look at todd purdum's new book, "an idea whose time has come" as we approach the 50th anniversary of the civil rights act. 60 years of news because this is "face the nation". captioning sponsored by cbs >> schieffer: well, good morning, again, all sides are urging caution but finally there may be a break in the case of missing malaysian airliner 370. the first reports of pings heard in the search area came from the chinese so we are starting there this morning with seth in beijing. seth? >> good morning. officially they are calling it an acoustic event but today for the third day in a row, people involved in the search report hearing signals coming from deep inside the southern indian ocean. today it was an australian ship carrying some high frequency listening devices that reported hearing these signals. and that location is 300 nautical miles from where the signals onboard that chinese ship were heard on friday and saturday. china was reporting that the frequency of the sig

"years of living dangerously" elaine quijano spoke today with the program's lead climatologist heidi cullen. >> tell me about what the premise of the documentary is who it is that you have as correspondent and what it is that those correspondents do to tell the story of climate change. >> it uses celebrities as cor correspondents. and i think provide it's a fresh way to look at climate change because you have celebrities who care about the issue but without don't fully know anything yet but are going on this journey. >> what is the problem y are we doing. >> it is incredibly powerful when you see someone like harrison ford go to indonesia and look at what deforestation is doing and you realize you can go all the way to indonesia and actually you are seeing an issue that plays out and has consequences right here at home. >> reporter: what can you say is established fact in this field? and what is still up for debate? >> i think it's really clear that as our planet warms it means more pain for more people. we know that climate disruption f will you, it equals economic stress, it equals food s

heidi cullen, joe romm, and jim hansen to bring the story of climate change to live for those yet toill its impacts. his is a clip from the trailer of "years of living dangerously." >> everybody thinks climate change is about melting glaciers and polar bears. i think it is a big mistake. this is 100% of people story. rising andthe water we went under. i knew i lost her immediately. >> i don't thinks kerry is the right word. dangerous, definitely. >> putting together the ultimate cast. they're going to be the correspondence. no more wildfire season. we have fires all year round. trucks this is unbelievable. >> we used to have seasons, now we don't. >> this is a lake? >> this abstract idea that the oceans are rising as the next generation's problem. >> is not a political issue, but a moral issue. >> a thermometer is not republican or democrat. >> what am i going to see in the next 50 years? >> there are going to be more storms and they're going to be worse. >> what have you done? >> do think it makes sense to just give up? >> i don't think the people are going to give up. >> you don't