. >> la jolla , cal, scientists here have been studying the ocean for over a hundred years to learn more about the complex issues impacting the environment. >> the ocean is responsible for a huge amount of clouds, so it's an important source. >> atmospheric chemists and her team are tackleing these complex issues head on . >> aerosol particles are these complicateed mixtures of everything, millions to billions of compounds. >> figuring out of the chemistry of what lies on the ocean surface impacts the cloud formation and two of the most challenging environmental un unknowns. >> each i'm it comes down that's a fingerprint of anothers particle. that's dust, that's sea spray. >> sea spray is one of many aerosols that researchers are studying. the aerosols float in the atmosphere in the mist we see when the waves crash along the shore. >> when i think of aerosol, i think of the spray camp type. >> different types of bacteria and micro organize isms when those break are in the air. the chemistry of what's in the seawater and what makes it out. some aerosols warm the planet, some cool the plan

we deal with it on a daily basis. >> because of la jolla's proximity to mexico and because the fenceng the texas border is incomplete, illegal immigrants are able to slip undetected into the united states. >> this is the border fence that the united states has built. apparently, this is where the fence ends right here. right behind me, this is how close we are to the river, you know. so there is a gap between here, the end of the fence, and maybe 50 miles west of where we stand at this point. >> the immigrants are sent to border patrol for processing. with so much of the border fence still under construction and a shortage of people patrolling the area, chief gutierrez knows incidents like this are bound to happen again, and he think there is really only one solution. >> i think we need stiffer punishment for these coyotes, these people transporting immigrants and trying to make a quick buck out of them. i think that can be the only way it will come to a halt. >>> it's a shocking end to a high speed pursuit. an 18-month-old flies out the back window of a suspect's stolen suv and stru

. >> reporter: vara sidner, cnn, la jolla, california. >> thank you so much for joining us here on cnn. of course we know that a copy of the pope's encyclical has already been leaked but the catholic church does warn it's not the final version. what are you expecting pope francis will say about climate change? >> well, i think we can assume, based on comments he's already made that he is going to affirm that climate change, global warming is the result, a lot of it is the result of man's activity. so with the heating of the earth and with fossil fuels, he'll talk about those specifically, i believe because he has spoke about them before and he will critique the way in which we have not moved forward to renewable energy and depended on this energy that is in fact heating up the globe. >> i want to ask you this, why do you think the pope's encyclical was leaked? who benefits from that? >> i'm not sure why it was leaked. there's some speculation that those not too happy about him in the vatican leaked it or perhaps a journalist passed it on to somebody else. journalists love scoops and th

in the context, mitt romney was getting hit as money bags and having an elevator for his cars in la jolla, so the last thing he would want is to have somebody on the ticket that might draw that same kind of attention. so we have to remember to put that all in context. >> reporter: and i think that the contrast with romney and his background is something that helps rubio here. republican voters do remember that that was an issue last time around and i think there's an instinct to go in a different direction, especially with many of these populist themes that are bubbling up under the surface. >> kasie hunt great to see you. it was on "morning joe" today that joe scarborough speculated about what or who was behind those damaging headlines. >> the timing of this. you know we've been hearing, i know you've been hearing from the beginning jeb's got the goods on marco. when they need to they'll do a big op po dump on him. it has all the markings of a dump but they'll scream it wasn't even though they predicted this would happen five months ago. you go are they really that desperate in june of 2

. >> the difference between a multi, multi, multimillion dollar house in la jolla with a car elevator an inground pool instead of an above ground pool -- >> no one said he was considering the above ground pool. >> is vastly different. >> mika was right. this shouldn't be written about. >> i actually do think -- >> he has a handsome brick driveway. what does that mean exactly? >> i don't know. i've never seen an unhandsome brick driveway. >> that is just such a stretch. i do think, though even though i criticize him at the time for the car elevator i do think a car elevator suggests that have no idea what somebody who is struggling to pay for off their credit cards and struggling to figure out how to get their kids to the school that their kids want to go to if they even get a chance to go to college. i think that does expose a wide gap between the candidate and the reality of 85% of americans like we said before. in this case with marco rubio's financial problems i think that just actually connects him more with us. again, as i said before if there are problems with campaign money, of