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The previously undisclosed program, called “Quiet Skies,” specifically targets travelers who “are not under investigation by any agency and are not in the Terrorist Screening Data Base,” according to a Transportation Security Administration bulletin in March.

The internal bulletin describes the program’s goal as thwarting threats to commercial aircraft “posed by unknown or partially known terrorists,” and gives the agency broad discretion over which air travelers to focus on and how closely they are tracked.

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“We joke that then we can fund all of our programming” with Bitcoin, he said.

The gunmen — between 1,000 and 1,500 of them, according to some estimates — are part of a recently formed paramilitary force protecting the continued rule of President Daniel Ortega against a three-month-old civilian uprising. Their main tactic is terror. They conduct roundups, fire at protesters, carry out dark-of-night raids and menace the population.

The Pro-Human Rights Association of Nicaragua said Thursday that paramilitary forces have conducted 595 “kidnappings” and disappearances of citizens since the uprising began April 18. The group said it has tallied 97 killings since July 11.

The firm’s shares opened down nearly 20%, a drop that wiped more than $100bn (£76bn) off Facebook’s market value.

The fall also dragged down the tech-rich Nasdaq share index, which was almost 1% lower.

Facebook’s forecast came as the firm faces a backlash over its handling of fake news and user data.

The company said it expected to boost spending by 50% or more, as it tries to improve the way it monitors content, tracks advertisers and treats user data – areas where it has faced regulator scrutiny.

What they believe to be a lake sits under the planet’s south polar ice cap, and is about 20km (12 miles) across.

Previous research found possible signs of intermittent liquid water flowing on the martian surface, but this is the first sign of a persistent body of water on the planet in the present day.

Lake beds like those explored by Nasa’s Curiosity rover show water was present on the surface of Mars in the past.

However, the planet’s climate has since cooled due to its thin atmosphere, leaving most of its water locked up in ice.

The result is exciting because scientists have long searched for signs of present-day liquid water on Mars, but these have come up empty or yielded ambiguous findings. It will also interest those studying the possibilities for life beyond Earth – though it does not yet raise the stakes in the search for biology.

Working out of a small office on Breithaupt Street in Kitchener, the team at Quantum Benchmark has developed software that finds and suppresses errors in the calculations performed by quantum computers, and tells users the likelihood of the answer being right or wrong.

“It is solving a problem that people have been asking about for two decades,” said chief executive officer Joseph Emerson.

This week, the startup took a quantum leap forward, announcing a deal with tech giant Google. Its True-Q software will be integrated into Google’s open source platform for building quantum algorithms. The platform, called Cirq, was launched this week.

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There are many working prototypes of quantum computers at UW and other technology centres around the world. But so far, no one has produced a practical quantum computer that can be used to solve real-world problems.

Emerson said one of the main reasons for that is nobody could detect, control and correct the errors produced by quantum computers. At least until now.

“And so we have actually provided that solution, and we have provided that solution in a very robust way, and this is based on two decades of research from my team,” said Emerson.

Few people cared about the issue when he started researching it 15 years ago, but that changed as more advanced prototypes were developed, he said, because quantum computers use atomic particles the technology is inherently fragile and prone to errors.

As bigger and more powerful quantum computers are built, the chance of error increases, Emerson said, potentially reaching a 50/50 chance that answers produced by the machines are correct. That’s the same probability as a coin toss.

“The best people in the field have been emphasizing this point, that there are errors and that spoil the recipe, so to speak,” said Emerson. “So you can use a near-term quantum computer or current quantum computer and it will give you the wrong answer.”

Google recognizes the significance of the issue, he said.

Increasingly, that’s the theme of modern America. More and more of what we do is dependent on permission from the government. That permission, unsurprisingly, is contingent on keeping government officials happy. Rub those officials the wrong way and they’ll strip you of permission to travel the roads, leave the country, or even make a living.