71 years ago, death fell from the sky and the world was changed. President obama makes an historic visit to hiroshima. Come to ponder a terrible force unleashed in the not so distant past. Streets under water. Severe thunderstorms bringing the threat of more damaging tornadoes to the central and southern plains. Start shaking. People flying for memorial day can expect long security lines. I thought, man, ive got to get out there early. I dont want to miss my flight. We had a big day today. We hit 1237. Trump can be get near the most powerful job in the world. It is up to us to say no. The u. S. Discovered its first known case of a super bug. One that cannot be killed by known antibiotics. The more we look at drug resistance, the more concerned we are. Three airlines evacuated 300 passengers and crews from an aircraft in tokyo after smoke came from its engine. Airplanes collided, four crew members ejected and were taken from the ocean. Cant say anything, im only in fifth grade. President obama spoke at the g7 summit in japan. Said bernie sanders, g7, bingo. Youre 20th wedding verse is on saturday, correct . Thank you for reminding me. Do you have any plans . Yeah, jane and i will probably be in front of 20, 30,000 people doing something. What are you going to do in front of those people. On cbs this morning. I think youre great im your biggest fan when i was eight. You think youre big everyone thinking shut up and let adele sing announcer this mornings eyeopener presented by toyota. Lets go places. Welcome to cbs this morning. Charlie rose is on assignment to anthony is with us. We made it to memorial day weekend. We did. Very nice to have you here. President obama made history a short time ago in japan at the site of the worlds First Nuclear attack. The president placed a wreath and bowed his head at hiroshimas Peace Memorial park. He is the first sitting american president to go there. A cbs news poll thats out Shows Americans are sharply divided about the use of atomic bombs in 1945. 43 approve while 44 do not. Support is way down from 2005. Thats when 77 approved. Margaret brennan is with us, shes traveling with the president. Margaret, good morning. Reporter emotions were just too raw to visit hiroshima for 70 years. President obama came here, he said, to remind the world of the painful reality of the nuclear threat. More than 70 years after an atomic bomb decimated hiroshima, president obama paid his respects to the 140,000 lives lost. Standing 1200 feet from the epicenter of the blast, he solemnly laid a wreath and hugged one of the few remaining survivors. Flanked by japanese Prime Minister shinzo abe they gazed at the iconic dome that withstood a blast more powerful than 1,000 tons of tnt. We stand here in the middle of the city and force our selves to imagine the moment the bomb fell. We listen to a silent cry. The speech was remarkable for what it did not say. There was no apology for Harry Trumans decision to drop the bomb. When you have a weapon that will win the war, youd be foolish if you didnt use it. 8 15 august 6th, 1945, a nearly 5 ton bomb named little boy dropped. Three days later another struck nagasaki killing more than 70,000. Truman justified it as a Necessary Evil to end the war, but the bombings also triggered the dawn of a nuclear age, one that president obama has struggled to contain. He appealed to the next generation to ensure that a Nuclear Weapon is never used again. That is a future we can choose. A future in which hiroshima and nagasaki are known not as the dawn of atomic warfare but as the start of our own moral awakening. And president obama has brokered significant arms control agreements but admits only modest progress on nuclear security. Anthony, pentagon data shows that he has reduced americas own stockpile less than any post cold war president. Margaret brennan in japan this morning. Thanks, margaret. More than 38 Million People are expected to travel this memorial day weekend. It will be a major test for tsa. The agency is trying to avoid more scenes like this one, long screening lines have plagued the airports across the country leading to a sharp rise in frustration. More than 2 1 2 Million People are expected to fly over the Holiday Weekend. Here is a look at flights currently in the air. Look at that. We have correspondents keeping tabs on security lines at the busiest airports and were going to begin with kris van cleave at reagan national. Thats just outside washington. Kris, good morning. Reporter good morning. Were learning department of Homeland Security is going to ask congress for permission to use another 28 million to essentially make nearly 3,000 screeners fulltime employees. They say that will help screen an additional 80,000 flyers a day. Step on over. Step on over. Reporter the first real test of the travel season is under way for the tsa. Airports are bracing for record crowds as more than 231 million passengers fly from june through august. Thats 95,500 more flyers day than last year. The seasonal surge comes as the shorthanded tsa struggles to keep the security lines moving. Yeartodate more than 70,000 American Airlines customers have missed flights due to excessive wait time. Reporter on thursday American AirlinesSenior Vice PresidentKerry Philipovitch that more than 40,000 checked bags have also missed flights because of screening delays. It appears they did not after screening change. Reporter as we saw last week at chicagos airport patience is wearing thin as wait times have surpassed two hours. The nations airports are worried it will get worse as travelers start taking summer vacations. Passengers are frustrated, taking their frustration out on tsa and employees. It creates an environment that is already challenged and decide. Reporter the summer surge means planes are going to be fuller. So if you miss your flight today, the airlines say it could be tomorrow, even sunday before they are able to find a seat to get you where youre trying to go. Gayle. Oh, boy, kris, thats not good news considering its a Holiday Weekend. Thank you very much. Kris van cleave. Chicagos Ohare International airport has seen the worst lines, too. Travelers who missed flights last week had to sleep on cots. Dean is there, good morning to you. Reporter good morning, gayle. If you can see me, ive been through ohare many times before and ive never seen anything quite like this. There are very, very long lines. But the good news is they are moving rather briskly. We timed some people from the end of the line to getting through security, and they are getting through in about maybe an hour or more now. The ohare has been, of course, at the epicenter of the tsa mess and there have been lawmakers who called for the resignation of the tsa leadership if things were not improving. So they have added about 58 new Security Officers to the mix here along with bomb sniffing canine units to help expedite the process. Now, keep in mind that last year there were 77 Million People who moved through ohare. The problem is that at times recently it looks as though they have all come back all at once. So this the first real big test of the tsa to see if they can avoid another meltdown. Gayle, you can see, its quite a test. Thank you very much, dean. Only on cbs this morning Homeland Security secretary jeh johnson, the man who oversees the tsa will be here in studio 57. Thats ahead. Severe weather could disrupt travel this weekend. One person is dead and two are missing in texas after flash flooding overnight. Cars got stranded in high water and thousands lost power. Tornadoes stormed across the central plains. Violent weather damaged or destroyed dozens of homes. Omar villafranca in silver lake, kansas, near topeka, which is under threat of more storms. Omar, good morning. Reporter good morning. This barn behind me used to house farming equipment but now you can see behind me its twisted metal and broken wood. This wasnt even caused by a tornado but strong wind. Theres potential for more weather lying this in todays forecast. Tornadoes, damaging winds, and powerful strikes of lightning continued to punish the cental u. S. Thursday. Under water. Reporter this tornado plowed through brian, texas, tearing through power lines and ripping the roof of this home. Very scary. Very thankful to be aliev. More than 60 homes suffered damage. This house is barely standing. Everything wiped out. Boxing some up, you try to figure out what do i take, what do i leave. 29 years gone, just a flash. Reporter more than 14 inches of rain in part of the state triggered flash flooding prompting dozens of rescues. My gosh, look at them. Reporter cars emerged as highways overflowed with water. We were going to turn back and go that direction and it looks like more of the same that way so were back here. Reporter in camden, tornadoes reported thursday, devastating storms destroyed dozens of homes and left thousands without power. You could hear it ripping things apart. Honestly didnt think it would be this bad. Reporter kansas governor toured the damage where more than a dozen homes were destroyed. People people here cleaning up once the sun comes up, they are also going to keep an eye on the sky because there could be more disper weath Severe Weather on the way. Thank you, omar. Donald trump has enough delegates to clinch the republican president ial nomination. Estimates hes reached enough to win on the First Convention ballot. Support of more uncommitted delegates put him over the top. Donald trump posted this picture of celebrating with a big mac and fries on his proprietary plane. Youve got to love that shot. Chip has more reaction as he looks ahead. Reporter good morning. Donald trump holds two events ahead of the primary june 7th. Now that hes locked up the gop nomination, trump is eager to remind skeptics its know too late to jump aboard the trump train. Today was the day we hit the 1237, right, 1237. Reporter both on the stump and in a campaign video. Donald trump is not going to be the nominee. Donald trump not going to get to 1237. Reporter donald trump gloated about proofing his wrong. You heard the president say he will not be the nominee of his party. Reporter already setting his sights on post president ial memory. I want a statue in washington, d. C. , share it with jefferson or something. No. Reporter preparing for the president ial fight ahead he offered a preview of the strategy. I want my energy to be put in the states where it could go either way. Were going to focus on new york. I was in the state of washington. Were going to play heavy, for example, in california. Reporter those three states havent backed a republican in 20 years. Trump is counting on his unconventional style to change that. Its a choice between sharing in this great Energy Wealth or sharing in the poverty promised by Hillary Clinton. Reporter in an Energy Policy speech in north dakota, trump took aim at Hillary Clinton and pledged more support for the fossil fuel industry. Total untapped oil and gas reserves on federal lands equal an estimated 50 trillion. Think of that. Were loaded and we didnt even know it. Were loaded. Reporter Trumps Energy speech in north dakota was also politically strategic. He began the day 33 delegates shy of the 1237 necessary to secure the nomination. But before his speech a number of unpledged delegates in north dakota declared support for trump helping him cross the threshold. Anthony. Thanks, chip. Hillary clinton is on the defensive after fallout from a Critical State Department report on her private email server. Editorials argue the continuing scandal will make it harder for clinton to win the white house. Her primary opponent, bernie sanders, is now pushing to debate donald trump after clinton said no to sanders. Julianna goldman looks at clintons response to the new east email criticism. Julianna, good morning. Reporter good morning. Hillary clinton has said shes willing to cooperate with ongoing investigations but she did not with the state Department Inspector generals audit. While she says neither that nor the pending fbi investigation will affect her campaign, clinton acknowledged as she has before, that the email server was a mistake. My email use was widely known in the department, throughout the government. Reporter Hillary Clinton played defense thursday following the state Department Inspector generals report which concluded Diplomatic Security official did not and would not prove her exclusive reliance on a personal email account. Everything i did was permitted. Reporter clinton previously sounded confident the state department was on board. Yesterday she wasnt so clear. Well, i thought it was allowed. I new past secretaries of state used personal email. This was all bad judgment. Reporter the republicans presumptive nominee donald trump seized on the report, citing it as proof clinton isnt honest or transparent. Its devastating, the report. Its devastating. You look back at her history and this is her history. Reporter trump also tried to capitalize on the ongoing race between clinton and bernie sanders. Id love to debate bernie. Hes a dream. If we can raise 10 or 15 million for charity, which would be a very appropriate amount. Reporter senator sanders seemed delighted by the idea after being denied a debate with clinton in california. I really think it might be one of the highest rated events in television history. I think the goal would be to have it in some big stadium here in california. Reporter clinton and sanders have not met on a debate stage since april. Thank you. Reporter its clear this time clinton isnt playing. I understood they said that was a joke and im going to look forward to debating donald rump. Reporter Trumps Campaign insists he was joking about a debate with sanders. When we asked on a scale of one to ten of it happening, with ten being it would definitely happen, norah, they gave the idea a 0. Okay. No ambiguity there. Federal Health Officials are sounding an alarm after a startling discovery. Defense Department Researchers announced arrival of a nightmare bacteria right here in the u. S. They say the super bug is resistant to one of our strongest antibiotics. The head of the cdc said it is the end of the road for antibiotics unless we act urgently. Lets ask our doctor how much we need to worry. Good morning. Good morning, norah. David, is this our worst fear coming through . This is more of a wakeup call than an alarm call. This is a woman in pennsylvania who is somehow related to the military who had a urinary tract infection that had strange resistance to antibiotics so they sent it to walter reed medical center. There they found it had the dna to be resistant to one of the antibiotics. The last to show resistance in the United States. It had happened in china but here this is the first case. She is responsive to other antibiotics and shes going to be fine. What it means is the last piece of the puzzle is here on our homeland in the United States so we have to be aware. Its a wakeup call for all of us to question whether we need antibiotics and also for the government to really push these new things in the pipeline to help us. Now, the word is she didnt travel so it raises two questions. How did she gets it and how contagious is it . Youre right, gayle. We dont know how she got it, whether it came from food or she picked it up from somebody else. She clearly didnt travel over the last several months. Is it contagious . This kind of resistance in the bacteria is a piece of dna separate from its chrome some so it actually can spread to other bacteria. So we are worried about it. They have tested many other samples and they havent found it yet. So the testing will keep going. Obviously they are not going to test all the family members and acquaintances she had in pennsylvania. Thank you very much dr. Agus. Silicon valley showing an iron fist. Ahead how a tech millionaires fight with gawker were tracking Airport Security lines. How long will they get on this big Holiday Weekend . Ahead, Peter Greenberg on why welcome to toyotatime tons of awesome vehicles. 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