He said he will begin treatment in atlanta. Our dr. Jon lapook is joining us ww. Jon, what can you tell us . Ca reporter scott, president carter announced on august 3 he had a procedure to remove a inall mass in his liver. In a Statement Released today, mr. Carter said the surgery revealed the cancer is in other parts of my body. Now, the statement did not say what type of cancer the former president has and whether it began in the liver or spread there from another part of the body. Mr. Carter has a Strong Family history of pancreatic cancer. Fs three siblings and father died from it. Pelley jon, you have been doing some research on family history. Why so important . Reporter well, scott, theres a big study that showed that people who have three or more close relatives with pancreatic cancer have a 57time f creased risk of having it themselves. Now, i have to emphasize we dont know where it is starting. Cancer can go to the liver from anywhere, the gastrointestinal tract, the lung so we need a lot more information there and we need a lot more information before we can even begin to talk about what his prognosis is. Pelley today president obama said to mr. Carter, you are as. Silient as they come. We are rooting for you. Overnight, fireballs lit the sky and the ground shook like an earthquake in the chinese port city of tianjin. At least 17 have died, but thats likely to rise. Hundreds of victims are crowded into hospitals. Rres seth doane. Reporter this view from a highrise in the Industrial City of tianjin shows a ball of fire growing on the horizon. The flames quickly seemed to die down, then, a massive explosion lights up the night sky, ripping through area buildings. Sending out powerful shock waves felt several miles away. Authorities say it was equivalent to 21 tons of t. N. T. Exploding. Chinese Officials Say a warehouse filled with Hazardous Materials is the source of the blast. Security camera video shows one person being tossed by the force of the blast. Cell phone images show people running into the streets, trying to take shelter from flying debris, shards of broken glass and stone. One eyewitness said that the ground was shaking fiercely. Edass broke and everyone started running. Hundreds of injured have streamed into local hospitals. Officials say they are now monitoring local air quality. L ott, tianjin is a major Financial Hub here in northern china with a population of about 15 million. Pelley seth doane in beijing this evening. Seth, thank you. The investigation into Hillary Clintons email is broadening and is now sure to push deep into 2016. The former secretary of state has turned over tens of thousands of emails to the f. B. I. And will hand over her iivate email server. The question is whether usassified information was ever put at risk because of her homeual use of the server in her home to conduct state department business. Jan crawford has the new developments. Wow, thank you all so much reporter for months, hillary teinton refused to turn over the meivate server and instead sovided to the state department only the emails she considered related to her work as secretary of state. About half of the 60,000 emails on the server. The server contains personal communications from my husband and me, and i believe i have met all of my responsibilities, and the server will remain private. Reporter but with the f. B. I. Now reviewing the security of her email system, clinton changed course, agreeing to turn over to the Justice Department the entire server, a thumb drive containing copies of the e mails. Clinton used the private system for all her email, but she has repeatedly denied she used it to send or receive classified oformation which can only be transmitted across secure government networks. I am confident that i never sent nor received any information that was classified at the time it was sent and received. Reporter but the Inspector General for the Intelligence Community found in a limited review of 40 emails that at least four contained classified information when they were generated and should never have been transmitted via an unclassified, personal system. Yesterday, the state Department Said the Inspector General determined that two of those sur emails should be upgraded th the top secret level. Thats one of the highest levels of classification. Now, the emails were not marked al classified, but, scott, not all classified information is stamped classified, and state Department Employees are trained to recognize that kind of highly Sensitive Information and not discuss it outside of classified eas. Pelley jan crawford reporting for us this evening. Jan, thank you. Republican president ial contenders were quick to take advantage, and nancy cordes has that. We need popular support. Reporter clintons email problems have gone from fodder for republicans to a virtual feast. Lker was wisconsin governor ott walker today R Hillary Clinton would be a good deceiver in chief but she cannot be trusted to be the commander in chief. Reporter and this was former Florida Governor jeb bush t thinking it was okay to use a private server, thinking that der server would be safer than the state departments firewalls . Reporter business woman Carly Fiorina accused clinton of lying. Do you think Hillary Clinton did hee right thing, handing over her email server to the f. B. I. . Of course, and she should have done it long ago and she did the wrong thing by deciding which emails to destroy. Reporter at the very least, its a distraction for clinton, who has tried to stick to substance in recent weeks. We need to make a quality education affordable. The cuba embargo needs to go once and for all. applause reporter but the enversation keeps shifting back ti her emails. Maybe the heat is getting to everybody. On all have a responsibility to get this right. Whoa reporter the controversy rauld be contributing to the rapid rise of her democratic opponent, senator bernie sanders, in New Hampshire. Sanders, who is from neighboring vermont, leads clinton 44 to 37 in New Hampshire, according to a new poll. Rce president joe biden, who hasnt ruled out a run, is at 9 . In a letter to supporters today, the Clinton Campaign tried to downplay her server woes saying o st none of those republicans f rved as secretary of state or rindled the kind of sensitive material that clinton did. At least one Congressional Republican called for a criminal investigation today, scott, and g. O. P. Frontrunner donald trump said the same. Pelley nancy cordes, thank pu very much, nancy. A,e latest poll shows trump soading in iowa, eight points over ben carson. Scott walker from next door wisconsin is far back. Nnjor garrett spoke to the frontrunner last night in michigan. Reporter is this an endeavor ugh re going to carry all the way through the convention in november . Absolutely, absolutely. Reporter no hesitation . No hesitation whatsoever. Reporter what could drive you out of the race. The only thing that could yeally drive me out if my numbers drop down. Im a realist. But i dont see that happening. Reporter trump shrugged off poll numbers in New Hampshire and iowa saying he lost some ugpport after thursdays debate. Excuse me, did i win . Reporter thats for you to decide. Excuse me, if you dont say uss youre not an honest reporter. Goodbye. B reporter at an earlier press Conference Trump said his decision to run as an independent would depend on whether he was treated fairly by pee republicans in the primary atucus. What do you mean by fairly . Ly fairly is an instinct. I know what fair is. You know what fair is. Reporter trump again dodged questions about details of his economic platform. Were going to be announcing over the next two weeks numbers jud specifics knowing what i just said is right. You really have to be flexible on jobs and everything else. Reporter but he had no qualms attacking former Florida Governor jeb bushs promise to theate 19 million new jobs and generate 4 annual economic growth. Jeb bush will not be able to negotiate against china. Jeb bush will not be able to tgotiate against mexico. Hi reporter trump returned to ane topic of china in his speech and said the communist governments decision to lower the value of its currency compared to the u. S. Dollar would hurt american businesses. You know what devalue means, right . Devalue means suck blood out of the united states. Thats what devalue means, okay. Reporter the Bush Campaign told us trump has not presented any specific ideas to grow the economy or create jobs, scott, adding that hes only launching baseless attacks at his opponents. Pelley major garrett, thanks. And speaking of the chinese economy, china devalued its currency for the second straight day today. Its off nearly 4 . Its a highly unusual move for the chinese who see their ffonomy slowing and want to aost exports by making their products cheaper. Melody hobson is a cbs news financial and economic analyst. And, melody, what does all of this mean for u. S. Companies . Reporter well, thats a good question. Weve seen Companies Like apple, their stocks really take it on eoe chin because people are saying theyll sell less iphones. This comes down to the fact that re you are exporting goods from therica to china, those goods mall be marginally more expensive. And if people feel like they t nt afford them, they may not buy them. So thats the big question for american companies, will this mean less sales in china . Go pelley whats going on in the chinese economy . Is almost looks panicky. Reporter it does feel like theyre going from crisis to adisis. They had the real estate bubble. Then they had their stock market completely blow up. And now theyre dealing with this issue of devaluation. Its all about one issue, scott growth. Slowing growth in the country. Theyre pulling out all the stops to keep this growth up and keep it going. T pelley second largest economy in the world. Melody hobson, thank you so much. In texas, a 49yearold Rookie Police officer is out of a job tonight after a deadly shooting. Heres omar villafranca. Reporter Arlington Police chief will johnson wasted no time firing rookie officer brad miller for using what he called poor judgment that left an unarmed black teenager dead. I have serious concerns as to the rationale articulated the use of deadly force in this incident. Reporter early friday morning, six Arlington Police arficers responded to a burglary sll at this car dealership. Security cameras show 19year ead Christian Taylor acting erratically and jumping on a car windshield. The College Football player later drove his s. U. V. Through the dealerships glass wall. Thats when Chief Johnson says officer miller violated Department Policy and entered the showroom alone without telling other officers. After a verbal confrontation, a e teenager made a move towards the officer. Sur shots later, taylor was dead. An additional fact that is important to know there was no physical contact between mr. Taylor and officers. Reporter taylors death adds to the increased scrutiny of policeinvolved shootings. This year, every nine days, an unarmed black man has been shot by police, and in 2013, black men between the ages of 16 and 25 were four times more likely to be killed by police, compared to white men in the same age group. Collette flanagans son died at the hands of police two years ago. Lle wants miller criminally charged. We need police officers, when they see our sons, we need them to see their sons, to see their fathers and their nephews. Reporter miller cant appeal the firing since it happened when he was still in training, but his attorney released a statement that read in part, officer miller made decisions in the heat of a violent confrontation to save his and other officers lives. Scott, this case will go to the d. A. s office. Pelley thanks, omar. Water quality in colorados animas river is said to be back to what it was before three million gallons of toxic waste spilled last week. But Mireya Villarreal reports the worries have not been washed away. R reporter exactly one week since its breach, toxic water is still flowing out of the gold king mine. Does it pain you to see this happening . Me i think what really bothers me is is we had the Water Quality getting a lot better and now its gotten worse since then. Reporter peter butler is Co Coordinator for the animas river stakeholder group, which has been trying to clean up the areas 200 abandoned mines for 20 years. He says the e. P. A. Could have avoided this latest blowout. They could have taken another step to determine how much water was back there. Reporter so this could have been preventable. It may have prevented it. They certainly probably would have taken a different approach if they knew the water was back there. Reporter e. P. A. Chief gina kccarthy was in the region today. E. P. A. s mission is to protect the Public Health and the environment. No agency could be more upset about the incident happening. Reporter contamination from mine water is not new to the area. Nearby, the red bonita has been spewing toxic waste into the river for at least a decade. Butler says those who built them deserve some of the blame. Theres a question of whether or not the public is willing to put up some money to fix some of these sites. But most of the sites up here, the people who did the damage are long gone. Reporter there has been a lot of talk about making all of these colorado mines a superfund site with the e. P. A. , but, scott, our experts say that solution probably isnt the best one because the government just doesnt have enough money to fix, treat, and then maintain all of these mines. Pelley Mireya Villarreal thar durango tonight. Mireya, thank you very much. Its a growing problem planes versus drones. Whats being done about it. And, millions of plastic balls are unleashed against the drought when the cbs evening news continues. Youre taking the medicine doctors recommend most for joint pain. More than the medicine in aleve or tylenol. The medicine in advil is the number one doctor recommendation for joint pain. Relief doesnt get any better than this. Advil you drop 40 grand on a new set of wheels, then. Wham a minivan tbones you. Guess what your Insurance Company will only give you 37thousand to replace it. Depreciation they claim. How can my car depreciate before its first oil change . You ask. Maybe the better question is, why do you have that Insurance Company . With Liberty Mutual new car replacement, well replace the full value of your car. See Car Insurance in a whole new light. Liberty mutual insurance. Feel like a raging storm. Ive tried laxatives, but my symptoms keep returning. My constipation feels like a heavy weight that keeps coming back. Vo linzess can help. Oncedaily linzess treats adults with ibs with constipation or chronic constipation. Linzess is thought to help calm painsensing nerves and accelerate bowel movements. Linzess helps you proactively manage your symptoms. Do not give linzess to children under 6, and it should not be given to children 6 to 17. It may harm them. Dont take linzess if you have a bowel blockage. Get immediate help if you develop unusual or severe stomach pain, especially with bloody or black stools. The most common side effect is diarrhea, sometimes severe. If its severe, stop taking linzess and call your doctor right away. Other side effects include, gas, stomacharea pain and swelling. Bottom line, ask your doctor about linzess today. Therthat can be serious,ere. Even fatal to infants. Its whooping cough, and people can spread it without knowing it. Understand the danger your new grandchild faces. Talk to your doctor or pharmacist about a whooping cough vaccination today. Pelle pelley pilots in record numbers are reporting problems with what they describe as buzzing, flying pests not mosquitoes, drones. Kris van cleave asked the head the f. A. A. Whats being done. Av reporter so far this year, fllots have reported drones leying near their aircraft at least 650 times, nearly triple all of 2014. In june alone, there were 138 reports, up from 16 last year. This as demand for hobbyist drones weighing anywhere from between two pounds and more than 50 has soared. F. A. A. Administrator michael huerta. How concerned are you about the number of drones that are up in the air right now . The very, very small ones, we feel represent much less of a hazard. Were much more concerned about t e higherperformance Unmanned Aircraft, those interacting in the airspace with commercial aircraft, with private pilots. Reporter huerta believes some recreational drone users dont know the rules flying below 400 feet and more than sove miles from an airport. And he calls the recent California Wildfires a game changer. There have been more than a dozen cases of drones disrupting firefighting efforts. Ng if you are flying an Unmanned Aircraft in a way that is unsafe, we will find you and we will hit you where it hurts. The penalties are pretty significant. There can be fines up to 25,000 and possibly significant jail time. Reporter but the f. A. A. Has issued only five fines since 2011. At least three more are pending. Since owners dont have to register drones, cracking down essentially means catching the o