But it is one that is in the best interest of the people of baltimore. Baltimores top cop is dismiss. Fm and mr. Popularity, Bernie Sanders. Is he more than just a wakeup call for Hillary Clinton . Plus hes got rhythm. Grammy winner Terrence Blanchard opens up about the life in jazz and what lies ahead. We begin this hour with a technical glitches and sudden malfunctions that caused a lot of havoc for traders and airline passengers. Long lines lots of headaches and planned of unanswered questions. United airlines and then the snawctsnewyork Stock Exchange shut down because of computer problems. Lisa stark is in washington with more. Least lisa. David imagine one major Computer System goes down then another. Was something suspicious going on . All the Computer Systems back up and running thousand but it was a scramble for United Airlines and the Stock Exchange as the operations ground to a halt. It pushed back another hour traveling with two small kids. The company scrambled to ground its flights nationwide. Around 8 45 eastern time. Then around 11 30 a. M. , the new new york Stock Exchange was shut down. Around the same time the wall street journal websites went offline complying displaik this error message. Displaying this error message. The president was briefed by his Homeland Security officer and the chief of staff. The good news, these outages appeared to be coincidental. At this point, there is no indication it is based on malicious intent or these situation he are related. During the forum on, wait for it cybersecurity. It appears what we know at there stage that the malfunctions at united and the Stock Exchange were not the result of any nefarious actor. No cyberastack but it turns out the wall street journal break down really was connected to the so Stock Exchange outage. Even as Cyber Security experts were breathing a little bit of sigh of relief, United Airlines passengers were dealing with a nightmare. It took only around an hour to get the system back and running you but that led to delays. They said they couldnt help the computer thing sending us back and forth and we couldnt get helped. The united problem was a computer router that was fiched fixed by 10 00 a. M. Which created more than awnd 800 delays. And new york Stock Exchange problem didnt get remedied until 3 00 p. M. Closely watched by the sec Ec Securities and Exchange Commission and the Computer Systems. Easily our lives you are disrupted when they are. And apparently this was the longest computer related outage at the new york Stock Exchange ever. David. Lisa stark, reporting from washington, thank you. Defense 1 reports on u. S. Defense and national security. Patrick, when you heard that the wall street journal the new york Stock Exchange and United Airlines, had all went down were you nerves . Inerves nervous . I was. United something to a router connected to the reservations seam i noticed that shortly later trading had halted on the new york Stock Exchange, linked to an article a tweet actually to an article that the wall street journal put out. Everyone in the world responded to that at the same time, what you saw was a coincidence and a Chain Reaction of different people running around, very nervous away went on, creating an air of urgency. It was just a coincidence that both of these things happened at the same time. A flash crash is what was being described happening at the new york Stock Exchange. What is a flash crash . I wonder if you could explain it for all of purchase. In 2010 in the month of may the new york Stock Exchange experienced a sudden event that were only now still beginning to understand what really happened. At the time it was this. A whole bunch of different highly 76thed trading algorithms acting on information moving far faster than what human brains could keep up, trading against one another one begins to sell, another one begins to sell, as one sells more, you see a Chain Reaction happening. It speaks on what reliance new york Money Companies be expect for the little bit of profit they can. Its little they can do to create a profit and they rely on tricks like this, high velocity trading, normal to squeeze profit out of the system you rely on algorithms. The flash crash in 2010 was as a result of that. There was information coming into the market, the had was greece major dip in values in china overnight, and what that did was trigger highly selected value moving. And we have to have time to understand it. It gets mag if i magnified. Patrick tucker, thanks for coming on. In china despite a rash of new moves by the government to prop up stocks, the market there continues to tumble. Hundreds of companies halted trading after last weeks emergency measures failed to be resolve the problems. Dropped more than 30 since last june when the chinese stock market was the best performing investor market in the world. Other countries are projecting impact it could have on the World Economy mary snow has the story. Chinas stock market has lost more than 30 since the middle of june and markets around the world are rattled. The questions asked whats next . We do live in an age where our Global Financial markets are interconnectand interrelated. Activity we see in one market could have an impact in other markets. Thats something we carefully monitor. Put simply, could markets in china slow their spending the ping will be felt far outside its borders but just how bad can it get for the u. S . Can china if they have a really sharp low down can that exert some slow downs on the u. S. Economy yes. But is a slow down in china going to create another recession in the United States, probably not. Then theres the dollar, rising against the backdrop of worry not only from china but from the seemingly imminent default of greece. If investors continue to seek safety and park money in traditions and even carb the dollar could strengthen, that has the potential of exporters exporters hoping to sell their goods abroad. Mary snow, al jazeera. The author of what the United States can learn from china. Professor lee how concerned are you that american investors american stockholders can be impacted severely by this market crash in china . Im not that worried about the impact, because very few are invested in the chinese stock market. The ones who are large hedge funds and Institutional Investors from the big banks because the Chinese Government had issued quotas in terms of how many Foreign Investors can be trading in those stock markets. And so the impact for you know the spillovers rather limited. And yet would you agree that this is a speculative bubble in this market that has now popped . Yes, i would agree with that be characterization. It is clear it is a very sharp runoff and now it is a very quick fall from the top. Whats the danger to the overall China Economy which might have a much larger impact in the u. S. Than just this particular Chinese Market . Sure, i think thats what people are worried about. And i would say that although this may impact the economy in the short term, i dont see this as more than a hiccup in terms of chinas Overall EconomicGrowth Prospects because china certainly has a lot of legs that they are relying on, including all the infrastructure initiatives that they have announced with Multilateral Companies and they also are throwing a lot of liquidity at this market. The Chinese Government is adamant that they want to make sure the Financial Markets dont fall apart. And so if i had to make an analogy, theyre behaving in the same way that the Federal Reserve was behaving during the 2008 financial crisis where the financial reserve i mean the Federal Reserve instituted a lot of conventional measures to try stabilize the market and the Chinese Government certainly has that same willpower and the ability to do that. The United States has a lot of debt that is owned by china. Is that a potential problem as the chinese economy gets shakier or is the Chinese Government committed to not affecting that . Well, so a lot that is said is in trillions of foreign reserves held in china. And certainly china will draw upon those reserves if they need to support the market. Or any other economic initiatives that they have there. And so with that, thats actually good news for stabilizing the situation in china. Because its sort of like extra savings to buttress you know any weakness that they might have. So its their own insurance policy to have essentially a stimulus to keep the market propped up. Absolutely. Thanks for coming in, we appreciate it. Thanks for having me. In greece today Authorities Say that banks will stay closed until monday and the Officials Say trick trick limits on strict limits on atm withdrawals will stay in place. Jonah hull reports. After the brinksmanship of refusal ever the referendum in greece Alexis Tsipras comes to brussels. We are determined not to clash with europe but to tackle head on the establishment in our country and to change the mindset which has taken us and the euro zone down. The grand standing is unlikely the have impressed eu leaders who had gathered the night before in brussels only to discover that the greeks would not present new reforms until thursday. Although greece had asked for a new three year financial bailout. Until now i have avoided talking about deadlines but i have to say it loud and clear that the final deadline ends this week. So the view from brussels is that we are in the final count down, a matter of days to determine the future of greece and its people but a long way from brussels at places like this a Charity Clinic in central athens serving people who have really nothing left, that means that life may get marginally better or much much worse. Doctors of the world cares for swelling armies of migrants, Asylum Seekers and greeces own sick and poor. He hasnt had a job for two years, no pension or medical insurance but he does have a medical condition. Translator if i did not have this place would i fight for as long as i could stand on my feet and then would i drop off the acropolis. But how does a charity survive whether the when the givers no longer can afford to give . We are very afraid because next week if the government doesnt continue, they dont have access to their money they wont have any money no food items to bring so it will collapse. German doctor. Im feeling very greek after 25 years living here in greece. Whether a deal is struck to save greece and its place in the euro zone will depend on german leadership and german money. Im sure mrs. Merkel and all the german people know the greeks are very bad they have visited the place here and the progress of this country and im quite sure theyre going to try best. But in brussels and berlin as in life there are few guarantees. Jonah hull, al jazeera athens. Back in the United States, the mayor of baltimore today fired his citys Embattled Police commissioner. The termination follows a deadly increase in crime and riots after the death of an unknown blackman in custody. Paul beban has the story. Paul. Until today he had reliable support from Baltimore City hall. But mayor stephanie rawlingsblake said it was time for a new top cop. She thanked Anthony Batts for his service but said they needed a change. It is one that is in the best interest of the people of baltimore. The people of baltimore deserved better. Reporter the mayor said an ongoing spike in murders demanded a change in leadership. Batts firing came two and a half months after the city plunged into violence after the death of freddy gray. In may there were a reported 42 homicides a 25year high. Batts called it a crisis and called for help from the federal government. This is all hands on deck. All hands every single resource, every single body, every single personnel. On the streets of baltimore. Reporter tuesday night gunmen jumped out of two vans and opened fire near the university of maryland baltimore. Three people were killed and a fourth was injured. But even amid soaring crime the mayor stood by her commissioner until now. Even defending him in the face of criticism from his own force. On tuesday baltimores Police Commission released its own report poiting pointing the finger squarely at police leadership. Police ordered not to engage. It reads in part, these riots in part were preventible however Baltimore Police commanders failed to meet standards on all levels. As a result, chaos and lawlessness ensued. Tensions between the force and the commissioner had been high ever since the protest. The charges brought by baltimores states attorney marilyn j. Mosby at her News Conference mayor said that had nothing to do with giving batts the boot but nonetheless it was time for him to go. Former commissioner be Anthony Batts released a statement saying ive been honored to serve the citizens of baltimore been proud to be a Police Commissioner for this city. Kevin davis was be appointed interim Police Commissioner immediately. Whereby david. Can a new system to restore bail receive justice and South Carolina be be ftc legislators deciding whether to remove the Confederate Flag. Americas top Law Enforcement officers expressed his fears today about the use of encryption technology. Fbi director james comey. Jamie mcintire has more from the pentagon. Is. Reporter david, this is the case of two competing and compelling interests, how much of one americans are willing to give up to get more of the other. Debate was kicked up a notch in a series of Senate Hearings today in which the fbis top man said i. S. I. L. Is disploiting the exploiting the technology in devious and ways. Through highly encrypted messages sent directly to mobile devices of potential recruits. It buzzes in their pocket so there is a device almost a devil in their pocket that says all day long, kill kill kill. We will give them directions to a mobile messaging app that is enincremented saying contact me here and they disappear. Comey and a fellow official be describe the dangers of going dark. Were creating site zones where dangerous criminals and operatives can operate and avoid detection. Realtime communication and data at rest, locked in devices such as mobile phones, laptops and hard drives. These encrypted devices are becoming the equivalent of closets and safes that can never be opened even when a judge has expressly authorized a search for evidence inside them. If we intercept data in motion between two encrypted devices or across encrypted mobile messaging app and its strongly encrypted we cant break it. Sometimes people watch tv and think fbi has some way to break this strong encryption. That is not. That is why this is so important. Insist encryption is an important tool for individuals to protect their personal private data and they say the government should never have a master key. If there is a legal requirement from a Law Enforcement agency to access any of the individual users data it is not something that is granted by definition. It goes through a very thorough Legal Process review before we would grant access. But the Obama Administration insists it is not seeking a back door into encryption software. Thats a highly controversial idea adamantly opposed by many prominent experts in the tech community. Who say undermining encryption would only make the situation worse and provide a bonanza for hackers. That the companies themselves will retain an ability to be able to access the information and to provide that information to us with lawful court orders. There was some frustration by members of congress that the administration was not offering any clear answers. James grassley said that back in january president obama you white house has proposed no changes in the law. At one point the fbi director comby simply said the problem was really, really hard adding i dont come with a solution. I dont know what the answer is. David.