Capitol hill. Heading into a busy Holiday Weekend, airlines are pitch information to help out. Thats correct. [ applause ] for the second straight year, two students will share the National Spelling bee title. The winning words and what they even mean. Good morning from the studio 57 newsroom at cbs news here in new york. Im annemarie green. Today, president obama becomes the first sitting president to visit hiroshima where seven decades ago the United States dropped the first atomic bomb. Early this morning, mr. Obama arrived at a Marine Corps Air station about 26 miles southwest of the city. Hell travel to hiroshimas Peace Memorial park to place a wreath. The bomb killed an estimated 140,000 people. The president remarked briefly on the visit in a speech to the marines. This is an opportunity to honor the memory of all who were lost during world war ii. Its a chance to reaffirm our commitment to pursuing the peace and security of a war where Nuclear Weapons would no longer be necessary. Its a testament to how even the most painful divides can be bridged. The president will not apologize for the bomb or second guess president trumans decision to use it. It was nearly a year ago that donald trump launched an unlikely campaign for the republican president ial nomination. Hes knocked off 16 rivals, and cbs news estimates trump hit the magic number yesterday, reaching 1,238 delegates. One more than he actually needs. Hena daniels is here in new york. Good morning. Reporter good morning. Trump is campaigning in california today. A state he says he can win in november. Yesterday, he celebrated his remarkable political win and looked forward to the campaign to come. We had a big day today. Today was the day where we hit the 1,237. Reporter billionaire Businessman Donald Trump celebrated his lock on the gop nomination with a big mac aboard his private jet. Now were the nominee. Were going to have a great convention. Reporter these two north dakota delegates were ted cruz supporters until they switched their Alliance Thursday morning. I asked how many delegates do you have. They said they were sitting at 1,235. I said, let me let you talk to 1,236. Hes the only person left in the battle. I decided to be the 1,23. Reporter in an unprecedented move, trump and Bernie Sanders may face off in a primetime debate, excluding democratic frontrunner hillary clinton. Very excited about it. And i think im going to have to rent out the largest stadium you have here in california. [ applause ] reporter clinton says not so fast. Im telling you, i am so looking forward to debating donald trump. I cant wait reporter before that happen, clinton has to clinch her partys nomination. Shes fewer than 100 delegates away, but a new poll shows shes neck and neck with sanders in california where 475 delegates are at stake on june 7th. That proposed debate between trump and Bernie Sanders is far from a done deal. Trump says he wants the network that carries it to donate 10 million to charity. Annemarie . Well see how that goes. Hena daniels here in new york. Thanks a lot. If youre one of the 2. 6 million americans expected to fly this Holiday Weekend, there is a good chance you will run into long Airport Security lines. The tsa says its working to try and resolve the issue, and yesterday Congress Heard from travel executives. Mark albert reports. Reporter airline and airport executives testified before Congress Thursday about the impact long lines at tsa checkpoints is having on their business. Carrie filapovich says customers are fed up. Year to date, more than 70,000 American Airlines customers have missed flights due to excessive wait times. Reporter a new poll shows more than 20 surveyed are changing or canceling Summer Travel plans because of the delays. Not everyone we talked with worried about the long lines. Speeding things up becomes a major issue. And our safetys a little more important. Reporter tsa Officials Say the biggest problem is they need to hire and train more screeners, meaning long lines at some airports could last throughout the summer. Nearly 450 million passengers have been screened this year. Thats up 57 million or 12 over last year. The tsa is doing it with 5,800 fewer screeners than in 2011. Congressman buddy carter says outsourcing would solve the problem. Im convinced that the private industry can do this just as well with oversight with tsa and save money and improve customer service. Reporter 22 airports across screening process, including San Francisco national airport. Mark albert for cbs news, arlington, virginia. Airlines are pitching in to help free up tsa screeners. American has contributed 4 million, and delta has chipped in five more to hire people to do nonsecurityrelated work at checkpoints. Coming up on cbs this morning, well talk with Homeland Security secretary jeh johnson about the airport delays and what the tsa is doing to remedy the situation. Another night of Severe Weather across the plains and southeast. Theres flooding in austin where rescue crews are searching for two people who were swept away by rushing water. 137 roads are closed. Late yesterday, a tornado rolled through the middle of bryant, texas, northwest of houston. More than 60 homes were damaged. Three were completely destroyed. More rain and dangerous flooding is forecast, but there are no reports of serious injury. 19 people who were trapped by rising water in a kentucky cave were able to make their way to safety. Two tour groups were in the hidden river cave in central kentucky when a storm hit sooner and harder than expected. The water was neck deep and moving fast. The strand eed cavers lost communications. One group, including students from clemson university, was stuck for more than six hours. Two Police Officers got trapped when they tried to rescue the group. New overnight now, search teams may have picked up a signal from egyptair flight 804. Egypts chief investigator says the signal may be coming from the planes emergency locator transmitter and doesnt mean the planes socalled black boxes have been located. It does narrow the search area. The jet went down in the mediterranean last week with 66 people on board. This morning, there was an engine fire on a korean air jet about to take off from tokyo. All 302 passengers and 17 crew members evacuated. Fire crews used foam to battle the fire. The boeing 777 was headed to seoul. There are unconfirmed reports that seven people were injured during the evacuation. The navy says its not sure what caused two of its jet fighters to crash into the ocean off the coast of north carolina. The fa18 super hornet fighters went down during whats described as an inflight mishap off the coast of Cape Hatteras during a Training Mission yesterday. There were two crewmen on the jet. Two were rescued by a fishing boat and transferred to a coast guard helicopter. The other two, the coast guard hoisted out of the water. There were a couple of oil scenes. We could tell where the aircraft had went down into the ocean. All four airmen are in good shape, suffering just minor injuries. Coming up on the cbs morning news, a bounce for womens soccer. The National Soccer team gets support from the senate in its bid for equal pay. Gawker fires back. Harsh words for the billionaire who waged a secret campaign to take it down. This is the cbs morning news. Having acne. Was always on my mind. So i asked a dermatologist about new aczone dapsone gel 7. 5 . I apply it once a day, any time. Aczone gel 7. 5 is fda approved for the topical treatment of acne for people 12 years and older. 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And you learned two new words today. The u. S. Womens soccer team scores big in its fight for equal pay, and the latest in gawkers battle with a tech billionaire. Those are some of the stories on the morning newsstand. The founder of gawker media posted a letter to Silicon Valley entrepreneur peter thiel. Nick denton called him a thinskinned billionaire and a comic book villain. The blog network outed thiel as gay nearly ten years ago. Thiel helped hulk hogan win a 140 million judgment that could crush gawker. The Dallas Morning News reports the filing of two charges against the affluenza teens mom. Tanya couch is accused of helping her son flee mexico. Shes been indicted on charges of apprehension and money laundering. Her son was involved in a drunken crash that killed four people. The timespicayune reports that indiana is extending hate crime protection to police, firefighters, and medical crews. The law signed by the governor lets prosecutors seek stronger penalties when First Responders are targeted. The Huffington Post reports Senate Support for the u. S. Womens soccer team in their pay fight. A nonbinding resolution passed yesterday urges the u. S. Soccer federation to end pay inequality. Five players told the government that they are paid 25 less than the mens team. The federation disputes the figures. And the daily beast reports on an honor for a woman who was a u. S. Spy during world war ii. Stephanie raider will receive the legion of merit during her burial next week. Senator mark warner says that she was snubbed because of the Old Boys Network in the oss, a precursor to the cia. Still to come, drop the mike. Late, late show host james corden gets big laughs in a rap battle. Esome vehicles. Great deals for everyone thanks low apr financing woo heres your balloon i have the best team. Oh, here i come during toyotatime, get 0 apr financing on ten models. Offer ends may 31st. For great deals on other toyotas, visit toyota. Com here you go. And here i go toyota. Lets go places. Heres a look at the forecast in some cities around the country. Its huge mistake its like ross and rachel its on a break i think youre great im your biggest fan when i was 8 karaoke you think its your big thing but everyone is thinking shut up and let adele sing David Schwimmer and james corden were kod on the late, late show. Rebel wilson winning a rap battle by, unanimous decision. Rapping rebel. She can spit as the kids say. On the cbs money watch, a verdict in oracles battle against google, and surprise, surprise, gas prices rise ahead of the Holiday Weekend. Jill wagners at the New York Stock Exchange with that and more. Good morning. Reporter good morning. Wall street took a breather yesterday after two days of big gains. Fed chair janet yellen speaks at harvard today. Investors are waiting to hear her views on Interest Rates before the feds next meeting in june. The dow lost 23 points yesterday. The s p dropped about a point. The nasdaq gained six. A big win for google in its ongoing copyright battle with software competitor oracle. A jury found google did not violate copy right laws by using oracle programming tools while building its android operating software. Oracle claimed that google stole pieces of its programming language and sought 9 billion in damages. Oracle says it will appeal. Its reported that a top apple executive floated the idea of apple buying timewarner. During a meeting with timewarner executives last year. The Financial Times reports the idea never got beyond the preliminary stage. It never involved the chief officers. Apple is trying to ramp up its original programming, and timewarner owns hbo, warner bros. , and turner. Facebook and microsoft are banding together to build a giant cable under the atlantic ocean. Both Companies Deal with a tremendous amount of data. The cable will relieve their reliance on Telecom Companies and deliver Faster Service to customers. The cable will stretch from virginia to spain. And if youre hitting the road this Holiday Weekend, theres good news and bad. Youll see the lowest memorial day gas prices in more than a decade. Prices at the pump are at their highest level of the year, and they are heading higher. The average cost of a gallon of unleaded regular is 2. 31. Still, thats about 40 cents less per gallon than last year. Nearly 34 million holiday travelers are expected to drive to their destination. Their weekend. I cannot believe their destination this weekend. I cannot believe it is memorial day weekend. The unofficial start of summer. I dont think im ready yet im ready. Im ready. Jill wagner at the New York Stock Exchange, thanks a lot. Sounding the alarm on the zika virus. 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[ applause ] reporter cdc director tom frieden called the mosquito that transmits zika virus the cockroach of mosquitoes. We put them in a bottle coated with insecticide and see whether theyre knocked down or not. To see them in a bottle that had been coated with what should be a very effective insecticide happily flying around minute after minute, hour after hour, shows us how important it is that we improve the methods we have of controlling mosquitoes. Reporter the mosquitoborne virus has not been locally transmitted in the u. S. , but federal Health Officials continue to press congress for funding to fight zika which can cause serious birth defects. This mosquito is highly resistant to insecticides. There is no example of effective control of this mosquito in the modern era. Reporter the cdc says the