Colorectal cancer its the second leading Cancer Killer in the u. S. But, it is almost entirely preventable. Most colon cancers start as polyps. And screening helps finds polyps, so they can be removed, before they even turn into cancer. Screening also finds this cancer early, when treatment works best so if youre over 50, take control. Get screened for colorectal cancer. Screening saves lives. It could really save your life. Today the nation honored its Fallen Servicemen and women. At Arlington National cemetery, president obama laid a wreath at the tomb of the unknowns. Mr. Obama noted that 20 members of the armed forces have died in combat in the last year. There were plenty of parades from coast to coast, where the weather permitted. In livermore, california, military aircraft from past wars were on display. Today, Houston Police said they have no motive in sundays shooting rampage. Investigators say a man walked into an auto body shop and started shooting. One person was killed. Six others wounded. Including two police officers. The shooter was killed by police. Operations were back to normal today at new yorks jf airport one day after a computer outage created a massive backlog at the British Airways terminal. Crews were forced to write out boarding passes and baggage tags by hand. More than 1,000 passengers were stuck waiting for hours to board flights. At some of the busiest airports, bombsniffing dogs are helping speed up security lines. Their knack for finding explosives is unparalleled. The only problem is there arent enough of them. Here is transportation correspondent kris van cleave. 8yearold black lab sunny can easily detect the home made explosives used in the paris and brussels terror attacks. 19,000 different explosives. 19,000 . Yep. Special agent sheila fry is sunnys handler. When i started in 2002, not too many knew what a bomb dog was. Reporter the use of bomb sniffing dogs by local, state private institutions like universities steadily increased after the 9 11 attacks. There are currently 1,000 sniffing around u. S. Transportation hubs. The canines are especially selected. Trained nearly a year and serve for eight years. But as demand around the world increased. U. S. Law enforcement has seen the market for dogs tighten. It really makes me concerned. I think that we have an obligation to the public to keep us safe. And the dogs we know are the most effective screening tool for explosives. Reporter recently the doctor warned congress of the potential for a looming shortage. One of the major reasons for the shortage of quality dogs we rely heavily on procurement of dogs from other countries. A National Breeding program is a priority. Reporter Transportation Security Administration used to have its own breeding but shut it down in 2012 due to high cost. Now the agency says it needs some 60 dogs to add to the more than 300 it is using. Customs and Border Protection says it needs an additional 325 canine teams. We really need to think about a better way to provide these dogs. Because the it really is a National Security issue that we are all invested in. The tsa says it would look to add hundreds of more detection canines to airports in the coming years. Kris van cleave, cbs news, Reagan National airport, virginia. Addict tugs opioids including painkillers and heroin takes more than 29,000 american lives each year. A new treatment for addicts using implants should be available by the end of next month. Anna werner take is a look. I wok up every day. My focus on life was to find a way to have, get oxycontin to function throughout the day. Reporter 39yearold chris borgioni got hooked on painkiller after breaking his hip in 2003, battled addict forcing five years before hitting rock bottom. I knew if ive continued on the path i would eventually die. Reporter he checked into a clink where they gave him a pill used to wean addicts off opiates. But he would forget to take the medication and eventually relapsed. It was then his doctor enrolled borgioni in a Clinical Trial for a new treatment for opioid dependence. Here is how it works. Four one inch rods the size of a match stick are implanted into the upper arm. Over a six month period, the rods release the drug into the blood stream which then travels to the brain. There it latches on to receptors that are usually triggered by prescription pain pills or heroin, blocking the craving to get high. Dr. Richard rosenthal of mount sinai hospital oversaw the Clinical Trials. What excited you the most about this new development . Fight drug addiction. The risk for relapse is reduced because you are not going to miss a dose. Always going to have your new opioid receptors covered by the medication. With the implants it will give me the opportunity to, to just live a normal life without feeling the need to take a pill every day. I am hoping that by doing so, at the end of the treatment, i will be able to move forward without any medication whatsoever. Reporter dr. Rosen thol says the new treatment could eventually be used to help some 500,000 people currently addicted to opiates. The drugs cost is estimated at 6,000 every six months. Anna werner, reporting, thank you. Outrage grows after a gorilla is killed to protect the life of a young boy. The fallen. The cbs overnight news will be right back. Allergies . Stuffy nose . Cant sleep . Take that. A breathe right nasal strip instantly opens your nose up to 38 more than allergy medicine alone. Shut your mouth and say goodnight, mouthbreathers. Breathe right. Sir, this alien life form at an alarming rate. Growing fast, you say . We cant contain it any long. Oh you know, that reminds me of how geicos been the fastestgrowing auto insurer for over 10 years straight. Over ten years . Mhm, geicos the company your friends and neighbors trust. Indeed. Geico. Expect great savings and a whole lot more. And our adult childrenlaws have are here. Still. D in with us. So we save by using tide. Which means we use less. Three generations of clothes cleaned in one wash. Those are moms. Has anybody seen my pants . Lasts up to two times longer. Put those on, dad its got to be tide. Our bacteria familys been on this alright kiddos erations. Everybody off the backpack, we made it to the ottoman. I like to watch them clean, but theyll never get me on the mattress finally theres a disinfectant mist designed for sofas, mattresses and more. Introducing new lysol max cover. Its innovative cap has a 2x wider spray that kills 99. 9 of bacteria. Max cover is another great way to lysol that. Today the director of the cincinnati zoo said officials have no choice but to kill a gorilla after a 4yearold boy entered its exhibit saturday. The gorilla dragged the child through water and was extremely agitated. But Animal Rights activists are outraged. Here is jamie yuccas. No cell phone video captured the terrifying moments. The boys mother could be heard calling to him. Mommy loves you. Im right here. The gorillas death caused a furious reaction of those critical of the zoos decision to kill the 17yearold ape. Today the zoos director said tranquilizing the animal wasnt an option. We did not take the shooting of the gorilla lightly. But that childs life was in danger. And people who question that, or are monday morning quarterbacks, or secondguessers dont understand that you cant take a risk with a silver back. Wildlife expert jack hannah tells cbs he agrees 1,000 with the zoos decision. They made the correct decision. Thank goodness a human being is alive because the decision of the cincinnati zoo made. The gorilla death is sparking outrage towards the mom. An online harambe has 200,000 signatures. It wants the. Brent s mother to face charges. Kim oconnor says moments before she took this video she heard the young boy and mom arguing. Im going to go in. No you are not. Im going to go in. No you are not. And oconnor heard the splash. He was pulling the boy under water by is a ankle. His head is banging against the wall, climbing up. So thats the part that people didnt see. The boys family released a statement saying he is home and doing just fine. Going on to say, we extend our heartfelt thank for the quick action by the cincinnati zoo staff. We know this was a very difficult decision for them, and that they are grieving the loss of their gorilla. The zoo says its barriers are adequate and officials are looking at whether there are ways to improve. Elaine, the zoo hopes to reown the gorilla exhibit by this weekend. A lot of strong feelis s harks are suspected of attacking swimmers on both coasts this holiday weekend. Thats next. Germany was hit with deadly storms over the weekend. Rain triggered furious flash floods that swept away cars and most Everything Else in the path of the rushing water. At least four people have died. Some 36,000 verizon workers will be back on the job wednesday ending a nearly tentative contract deal over the weekend. It includes nearly 11 raises over four years. Verizon retreated on efforts to cut pensions and send Call Center Jobs overseas. Beachgoers on both coasts fell victim to suspected shark attacks this long weekend. In florida, a 13yearold boy swimming at Neptune Beach was badly bitten on his leg while swimming in chestdeep water. At newport beach, california, a woman was bitten on her torso and shoulder. Both survived. A top athlete may skip the olympics in rio because of the zika virus. Pao gasol says there is too much uncertainty about zika which can cause severe birth defects. Brazil is the epicenter of the outbreak. How best to honor americas Fallen Heroes . Wheen w come back, a marine wourneys to the top of the p . P . O . Gv we end this memorial day with marines remarkable journey one of which almost ended on a minefield in afghanistan. Instead he became the first veteran wounded in combat to summit mt. Everest. Jericka duncan has his story. Reporter it took Charlie Linville seven weeks to reach the top of mt. Everest. This was his third attempt. He did it with a five pound prot thesis strapped to his thigh. I pushed my body to the ultimate extreme and came out victorious. Thats confidence i get to carry forever. Reporter the 30yearold marine, member of a bomb Disposal Unit was badly injured in 2011 while in afghanistan. The pain in his right leg was so severe he asked doctors to then all of a sudden i was in a hospital bed where people wanted to push me in my wheelchair, had nothing but pity, felt sorry for me. Wanted to take care of me. Soon after, linville was introduced to tim medvitz. Founder of the heroes project featured on 60 minutes in 2015. The organization trains gravely wounded veterans to climb the worlds highest mountains. To help them regain their strength. And ready themselves for a lifetime of highs and lows. We are going to show you what you are capable of and what the prosthetic legs are capable of. And what this is, what you are capable of here and here. How have you changed as a person . When i first got wounded i was very depressed. And it really definitely flipped me 180 degrees from where i was 3 years ago. Linville says this journey wasnt only about himself. When i got to the summit of i took a few tokens of Fallen Service members, really great friends, that i remembered. I said a little prayer. Not only for them, but for every Service Member that has given their life for our great country. The top of the world because for me that is as close as i can get to them. Reporter honoring those who died while learning how to live again. Jericka duncan, cbs news, new york. Thats the cbs overnight news for this tours day morning. For some of you the news continues. For others check back with us a little later for the morning news and cbs this morning. From the Broadcast Center in new york city. Im elaine quijano. Hi, welcome to the overnight news. Im demarco morgan. Presumptive republican nominee donald trump will try to clear up questions. The billionaire businessman is expected to provide details into the money he says he helped raise for veterans groups. Sunday, trump reemfa sized his support for the military at the annual Rolling Thunder rally on the national mall. Here is julianna goldman. Reporter good morning, as donald trump worked the stage his top aides worked beltway media fighting back against reports that the presumptive nominees campaign is in a state of chaos and might lack the muscle it need for a likely match up against Hillary Clinton. I thought this would be like dr. Martin luther king, where the people would from here all the way to the washington monument. Right . Reporter donald trump stood in front of a smaller than expected crowd at the lincoln memorial. Do we love the bikers . Yes. Reporter and delivered a standard stump speech in anything but standard setting. The Presumptive Republican nominee tore into Hillary Clinton, touted his controversial immigration proposals and paid tribute to americas troops and veterans. So we are going to rebuild our military and we are going to take care of our veterans. Trump announced tuesday hell announce the names of Veterans Charities that received money he raised earlier this year. Weep just raised 6 million for the vets. The billionaire businessman has come under fire for not fully accounting for the 6 million he says came in from a january fund raiser just before the iowa caucuses. But while trump was in washington his aide were playing cleanup. What we have seen, success time and again. Lewandowski pushed back against several reports that Trumps Campaign is rife with infighting and being poorly managed. The media wants to perpetuate the story. The bottom line is we are winning. Reporter while the Campaign Chairman and chief strategist, Paul Manafort steered the conversation towards likely opponent. Trouble follows the the clintons everywhere. People are frustrated with all of the drama around the Clinton Family and the history of the Clinton Family. Reporter Trumps Campaign manager says his team spent less money than the clinton kachl pain did and got better results. Anthony, Cory Lewandowski says it is an indication of how a Trump Administration would run. Frontrunner Hillary Clinton is facing a close primary fight in california against Bernie Sanders. The delegate rich state holds its primary june 7th. Meanwhile sanders is now using clintons email scandal to raise doubts about her electability. We come out of the Democratic Convention with the reporter sunday, sanders made it clear he wasnt giving up in california. California is the big enchilada. And floated clintons email investigation could be a liability. It was not a good report for secretary clinton something the American People, democrats and delegates are going to have to take a hard look at. Reporter a hard turn from this line last year. The American People are sick and tired of hearing about your damnemails. Clinton last seen in california friday was defended by supporters. Hillary clinton broke no law. She was mistaken about that. She thought it was approved. If she was a man all this stuff wouldnt be the same at the same level. California its ready for the political revolution. Reporter even if sanders wins, clinton could still clinch the nomination. She only needs 73 delegates. That is just 8 of the remaining delegates. Sanders says the democratic nominee system is flawed. You have a over 400 super delegates came on board Clintons Campaign before any body was in the race. Thats not rigged. I think jusaut a dumb process. A win for sanders would give him negotiating power to shape the Democratic Party platform at the convention. That also means he could influence clintons decision on a runningmate. Some one sanders would view as being a progressive choice. Another top story, dozens of Animal Rights advocates held a vigil at the cincinnati zoo for the gorilla killed to protect the 4yearold boy. The zoo facing backlash over the decision to shoot the gorilla after the boy slipped through a barrier saturday and fell into the animals enclosure. Here is jamie yuccas. Reporter cincinnati zoo Officials Say the child climbed under the railing, through wires and over a wall. He ended up in the gorilla exhibits mote, 15 feet below. The gorilla did not attack the boy, but officials felt because of the animals massive size, it was a life threating situation. We do wanto of the video you are about to see is disturbing. Reporter onlookers screamed as the gorilla scooped up a 4yearold boy and carried him through the mote of the cincinnati zoo and Botanical Garden gorilla exhibit saturday. The childs mother can be heard calling to her son offcamera. Mommy loves you. I am right here. Reporter the boy can be heard screaming. The gorilla has the the child. And is dragging him around the pen. Reporter after ten tense minutes the Zoo Dangerous Animal Response Team killed the 450 pound gorilla the child taken to the hospital and released later that night. They made a tough choice and the right choice. They saved that little boys life. It could have been bad. The reason that tranquilizing was not chosen is in an agitated situation, which the male was, it may take quite a while for a tranquilizer to take effect. It would take a few reporter zoo officials are critic