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The new process may also help in other procedures where doctors need to analyze tissue while they are still operating, such as head and neck, breast, skin and gynecologic surgery, the report said. It also noted that there is a shortage of neuropathologists, and suggested that the new technology might help fill the gap in medical centers that lack the specialty. Video Advertisement LIVE 00:00 1:05

Algorithms are also being developed to help detect lung cancers on CT scans, diagnose eye disease in people with diabetes and find cancer on microscope slides.

The diagnoses were later judged right or wrong based on whether they agreed with the findings of lengthier and more extensive tests performed after the surgery.The result was a draw: humans, 93.9 percent correct; A.I., 94.6 percent.

At some centers, he said, brain surgeons do not even order frozen sections because they do not trust them and prefer to wait for tissue processing after the surgery, which may take weeks to complete.

Some types of brain tumor are so rare that there is not enough data on them to train an A.I. system, so the system in the study was designed to essentially toss out samples it could not identify.

“It won’t change brain surgery,” he said, “but it’s going to add a significant new tool, more significant than they’ve stated.”

"As protesters gathered outside the White House Friday night in Washington, DC, President Donald Trump was briefly taken to the underground bunker for a period of time, according to a White House official and a law enforcement source.

"A law enforcement source and another source familiar with the matter tell CNN that first lady Melania Trump and their son, Barron, were also taken to the bunker.

So, why would Trump describe it falsely to Fox? Especially when there are a few other things going on in the country -- most notably ongoing protests over the murder of a black man at the hands of police in Minneapolis and a global pandemic that has killed 106,000 Americans and is projected to kill 135,000 by early August.

There is nothing Trump hates more than weakness. And the image of him cowering in an underground bunker while protesters stood outside the gates of the White House is simply not something he cannot accept. This is a man who has been telling himself a story of his life -- one in which he is always the toughest, the smartest and the winner-est -- for, well, his entire adult life.

He could have gone anytime, of course! It was just a coincidence he was down there amid the protests outside the White House! Just going down to make sure all the buttons worked! All the brass was sufficiently polished! And the like.

That requires a high bar and makes it difficult to win unless the situation is similar to a prior case with nearly identical facts. In some cases with unique fact patterns, of which there are many, officers have been granted immunity even if they have been found to have acted in violation of the Constitution.

"Everyone has the potential for adverse encounters with state actors, whether it's members of law enforcement, public school officials, city council members, or other municipal employees," said Jay Schweikert, a policy analyst at the Cato Institute. "So long as the Supreme Court continues to permit this unlawful shield for government agents, no citizen will have any assurance that their rights will be respected."

"Until we shift the focus of our inquiry to whether immunity existed at common law, we will continue to substitute our own policy preferences for the mandates of Congress," the conservative Thomas wrote in a concurring opinion. "In an appropriate case, we should reconsider our qualified immunity jurisprudence."

In its 1982 decision, the court found that the aides were entitled to qualified immunity. "Government officials performing discretionary functions, generally are shielded from liability for civil damages insofar as their conduct does not violate clearly established statutory or constitutional rights of which a reasonable person would have known," the court ruled.

"The principle that government officials should be accountable for their violations of the Constitution is not a partisan issue. It's an American one," Boston University law professor Jack Beermann said in an interview with CNN. "Conservatives are just as concerned with abuse of government power as liberals are. And you combine that with what seems to be a rash of police misconduct in recent years and you can get a pretty strong coalition."

"There's an incredible urgency as communities across the country seek accountability for police violence against individuals of color in particularly, to open up the courts, claim a constitutional violation and make sure officers aren't provided a get-out-of-court-free card when they violate people's rights,"

"We are in the midst of a crisis of accountability in law enforcement,

As George Floyd's death tragically illustrates, for many people in this country, our culture of near-zero accountability for law enforcement is not an abstract public-policy concern, but a matter of life and death.

"At its heart, qualified immunity protects police officers' split second decisions ... courts must afford them a measure of deference in their on-the-scene assessments about the application of force to subdue a fleeing or resisting suspect,"

"Abandoning qualified immunity ... would leave hundreds of thousands of law enforcement officers exposed to potential liability, likely second guessing themselves in situations where a hesitation to act could mean the difference between life and death," the lawyers said in court papers.

Our case presents some of the problems with qualified immunity very starkly," said Michelman, lead counsel representing Baxter in the case. "Everyone should know, and everyone does know, that putting your hands up is a universal symbol of surrender and it is completely out of bounds to attack somebody who has surrendered."

"These cases very frequently arrive from police use of force in particular circumstances," Hughes said. "When an individual or his or her estate alleges that a police officer used excessive force the officer will invariably raise a qualified immunity defense."

"This is a serious matter and we have to maintain our practices even as many people are relaxing restrictions and the economy is opening back up," Reed said in a phone interview.

Social distancing and masks "really work," she said.

Most states across the country can ease some restrictions safely, but projects spikes in areas that have broadly reopened early, according to the model put together by a team at the Children's Hospital of Philadelphia and the University of Pennsylvania.

"While our models show that rising temperatures and humidity levels are having an impact on reducing the spread of Covid-19, those hot, humid days of summer are not going to eliminate the threat of virus resurgence," said PolicyLab's Dr. Gregory Tasian, senior scholar in the Center for Clinical Epidemiology and Biostatistics at the University of Pennsylvania's Perelman School of Medicine.

Jefferson County, where Birmingham is located, had 1,453 confirmed cases as of Thursday, according to the state's health department data -- which is a jump of 35% from the 1,075 cases reported two weeks ago. The county has had 85 deaths attributed to Covid-19.

As of May 11, restaurants and bars were allowed to serve customers on site, gyms and athletic facilities, hair and nail salons and barber shops were allowed to open. Groups of any size are allowed, as long as the 6 feet distance guidance is followed.

The tumult in the U.S. economy still pales in comparison to the damage being felt in other countries. In China, auto sales cratered 80% last month, while a plunge in tourism is expected to push Italy and perhaps France into a recession.

The U.S. Travel Association predicts that international travel to the United States will fall by 6% over the next three months. "There is a lot of uncertainty around coronavirus, and it is pretty clear that it is having an effect on travel demand — not just from China, and not just internationally, but for domestic business and leisure travel as well," the association's president, Roger Dow, said in a Statement.

"Previous small-scale studies have failed to identify robust evidence of a benefit and larger, randomised controlled trials are not yet completed," Dr. Frank Ruschitzka, director of the Heart Center at University Hospital Zurich and the study's coauthor, said in a statement.

President Donald Trump has repeatedly touted hydroxychloroquine as a potential coronavirus cure. Earlier this week he claimed he was taking daily doses of it as a prophylaxis to prevent infection.

Items such as masks and hand sanitizer will be familiar sights in stuffed backpacks. Classes and school buses will have fewer people while some office meetings will be conducted by video conference, experts say.

Additionally, the study found serious cardiac arrhythmias were more common among patients who received any of the four treatments. The largest increase was among the group treated with hydroxychloroquine and an an antibiotic -- 8% of those patients developed a heart arrythmia, compared to 0.3% of the control group.

Children with underlying health conditions are especially vulnerable, and it's crucial that people follow rules to keep everyone safe, Altmann said. She shared other things US schools must address before unlatching their doors.

"We need to quickly test them, diagnose, isolate and then contact trace, which is a lot easier when there's fewer kids they've come into contact with throughout the day," Altmann added.

In New York, 16.6% of people have been infected, compared with 1% in California, the researchers said.

In the most severe scenario, the CDC assumes that 1% of people overall with Covid-19 and symptoms will die. In the least severe scenario, it puts that number at 0.2%.

"Go out, wear a mask, stay six feet away from anyone so you have the physical distancing," he said. "Go for a run. Go for a walk. Go fishing. As long as you're not in a crowd and you're not in a situation where you can physically transmit the virus."

Alaska is allowing all businesses to reopen, as well as houses of worship, libraries, museums and sporting activities, starting at 8 a.m. Alaska has the fewest cases of all states and has reported single-digit new cases since mid-April.

Irrational stockpiling can also lead to price gouging, says Steven Taylor, a professor and clinical psychologist at the University of British Columbia, and the author of The Psychology of Pandemics. “If the price of a roll of toilet paper is tripled, that’s seen as a scarcer commodity to acquire, which can lead to anxiety,” he says.

Panic buying, Taylor says, is fuelled by anxiety, and a willingness to go to lengths to quell those fears: like queueing for hours or buying way more than you need. We’ve seen this before throughout history. Back in 1962 during the Cuban missile crisis, when nuclear war seemed imminent, American families filled their basements with enough canned goods and bottled water to survive an atomic blast.

“But for many people, hand-washing seems to be too ordinary. This is a dramatic event, therefore a dramatic response is required, so that leads to people throwing money at things in hopes of protecting themselves.”

“Panic is a subjective, emotional state, and mostly what we can observe is the behaviour,” says Oppenheim. “Maybe someone reads articles or a couple of tweets about supply chain disruptions in China and mask shortages in Hong Kong, and then makes a very reasoned decision to stock up on masks just in case. All we can infer from the purchasing is the timing, so it could look panicky even if it's well thought through.”

"For as long as we have citizens willing to follow their example, to carry on their burden, to continue their legacy, then America's cause will never fail and American freedom will never, ever die."

But that doesn't mean it isn't jarring, as the most wrenching moment so far approaches in the nation's battle against a pandemic that while ebbing in terms of total deaths is trending up in 18 states, is steady in 22 and easing in 10 more. More than 98,000 people in the US have now died from the coronavirus and more than 1.6 million have been infected. More than 30 million Americans have lost their jobs and the unemployment rate is approaching Great Depression levels.

There was little evidence of a deeper meaning to his presidency at this stage than personal and political grievances.

No White House could have been fully prepared for the disaster and subsequent economic hollowing of this year's pandemic

Trump spent much of Memorial Day, fulminating against Cooper, complaining that the North Carolina governor was "unable to guarantee" the arena for the convention in August can be filled to capacity. The President is determined to deploy the full pageantry of convention season to portray a nation and economy in the full throes of what he calls a "transition to greatness."

Yet such a spectacle as the Republican convention seems utterly incongruous with real-world events. Sports teams that use such arenas are expecting to play without fans for at least months in a bio-secure environment. The prospect of thousands of delegates pouring into convention cities from all over the country, including coronavirus hotspots, is a huge headache for organizers.

"In other words, we would be spending millions of dollars building the Arena to a very high standard without even knowing if the Democrat Governor would allow the Republican Party to fully occupy the space."

It was not immediately clear whether Trump and the Republican National Committee are serious about pulling the convention from Charlotte.

Trump has used federal resources multiple times to fly to his resorts and golf courses. Trump's two rounds this weekend struck critics as inappropriate during a national crisis and on a weekend when American remembers its war dead.

"Nearly 100,000 lives have been lost, and tens of millions are out of work. Meanwhile, the president spent his day golfing," Biden wrote in a tweet accompanying an online ad Saturday.

Trump may not come under such criticism had he not been so dismissive of Obama's afternoons on the golf course -- and saying he wouldn't have time to play golf if he was elected president.

"In these kinds of public health emergencies, we need to be able to trust our leaders, be it public health, scientific or political leaders," Omer said. This will become particularly important in the coronavirus outbreak if there comes a time when the government needs to recommend major lifestyle adjustments to curtail the spread of the disease.

We ink-stained wretches admired Obama’s thoughtful ways around a subject, his meandering along pathways of implication and possibility, culminating in a formulation that, often as not, would be punctuated with an ellipsis rather than a period. One could often see his mind working as he spoke.

When Obama speaks, he obviously chooses each word with great care. He understands his responsibility to the nation and the world by expressing himself so carefully that nothing is left to interpretation.

Obama’s natural elegance, contrasted to Trump’s bombastic bleats, provided a reawakening to our better angels and the higher truths that have been diminished or forgotten these past four years.

we’ve learned that governance isn’t only about policies; it’s also about the persona embodied by the president of the United States.

Obama’s early losses, of his father through abandonment and his mother from premature death, are what propelled him to the summit. I spotted both engines in him long ago because I share them.

Harvard Business School, I think put out a study a few years ago, showing that something like 30% of all hiring for what's called sort of bachelor's level jobs are for skill sets that don't require a bachelor's. So that alone exclude something like 70% of African Americans for no reason.

This whole pandemic, what it's done, it's unmasked the huge disparities that exist in our society already. I mean, the fact of the matter is this educational one we just talked about in terms of access to broadband and hardware. But you look at the disparities. I mean, the African American according to a study at Yale is 3.5 times more likely to die from COVID than a white. Somebody who's Latinix is three times more likely to die. So this has unmasked these huge structural elements of racism that existed in this country for a long time. And we need to step up to those structural elements that determine the lives of so many people.

Well, this virus doesn't really care about that. And if you're going to do it, if you're going to exercise your liberty at my personal expense, then we can't control the pandemic. And the Europeans are looking at that and they're saying, "We don't want you bringing that into our shores."

We have to have the psychological armor to defend ourselves against the racism that's all around us, that's the first piece of advice.

The second piece of advice I give is that, you really can't plan your career. You have to take advantage of all the opportunities that you have before you. And I believe that at least in my own instance, what helped me a lot was that I wanted a certain level of autonomy and accountability. And when you do that, you get more responsibility because you are willing to go outside the lane of what most people do.

it's sort of humorous to me when people say to me, "I don't see color. I don't even notice that you're a Black man." Every minute of my life, I realize I'm a Black man. How they don't realize it is beyond me. But I really think it's important for young African Americans to have their own communities, to reinforce one another so that they can deal with that incoming.

My father Otis Frazier 's father, Richard Frazier , was born in 1861. And so I have only one generation between me and slavery, which is quite unusual for someone at this stage. And my father only had a third grade education and what passed for third grade education for an African American child in South Carolina, between 1906 to 1909. But he was self-taught. He had immaculate habits of speech and dress and behavior, and he was his own man. And he gave me the single most important piece of advice I've ever had when I was growing up in the inner city. And here it is, he would say to me, Kenny, what other people think about you is none of your damn business. And the sooner you learn that, the better off you'll be

now I can see when you're running a company like Merck and Wall Street is criticizing you because you don't do what they want you to do, I can hear my father saying, you know what they think about you is none of your damn business.

And that is what it meant to be a man to me, was to get up every morning, go to work, take care of your family, take your family to church on Sunday and to make sure that your children understood the importance of education and opportunity. And so, while I was born in a really tough inner city neighborhood, I always tell people I had the good fortune to be born in my mother and my father's house. More my father, because my mother died when I was really young and I was raised by a father who was not sentimental about his children, but had high standards. And it helped me a lot to have to live up to my father's standards, which I'm still living up to.

Educating yourself on the history and current state of racism is one way to show positive allyship, as reported in CNN's guide to being an ally.

Influencing the people in your circle is another -- and part of that can include sharing books about racism with friends and family and discussing how oppression affects marginalized groups.

"At the same time, we have to recognize that the violence of recent nights is self-destructive and self-defeating. Nothing is gained by violence and so much is lost," he urged.

Over the past few days, some Italian soccer teams have knelt in solidarity with US protestors over the killing of Floyd.