With new restrictions and fees on work visas in the US set to take effect at midnight tonight, it’s no surprise that many employers are advising workers abroad to return to the US. Leaked memos from Google, Amazon, and Microsoft have been circulating on social media that instruct instruct any H-1B visa holders currently traveling to immediately make travel arrangements to land in the US before 12AM ET on Sunday September 21st. The companies all acknowledge the limited warning provided and apologize, promising to provide more guidance as the situation evolves.

The memos also advise any H-1B employees and their H-4 dependents currently in the US to remain and not travel abroad until further notice. Since the changes to the H-1B visa are structured as a travel restriction, employers are concerned that any workers that are part of the program will be denied reentry to the country without a $100,000 fee.

We’ve included the full text of the leaked memos below. Microsoft declined to comment for this story, and Amazon and Google had not responded at the time of publication.

Microsoft:

IMPORTANT ADVISORY: New travel restriction for H-1B visa holders

Hi all–We have now reviewed the actual text of today’s Presidential Proclamation on H-1B visas, which you can find here: Restriction on Entry of Certain Nonimmigrant Workers – The White House.

Here’s what you need to know:

First, the proclamation is structured as a travel restriction. Beginning at 12:01 am eastern time on September 21, 2025 (so, 9:01 pm Pacific time tomorrow), individuals will not be able to enter/return to the U.S. in H-1B status unless their petition has an additional $100,000 payment associated with it.

What you need to do:

• If you are in H-1B status and are in the U.S., you should remain in the U.S. for the foreseeable future. We know this may interrupt your travel plans. But the critical thing is to stay in the U.S. in order to avoid being denied reentry.
• While the proclamation doesn’t reference H-4 dependents, we also recommend that H-4s remain in the U.S.
• If you are in H-1B or H-4 status and are currently outside the U.S., we strongly recommend that you do what you can to return to the U.S. tomorrow before the deadline. The Proclamation was released within the last 30 minutes, so we realize that there isn’t much time to make sudden travel arrangements. But again, we strongly encourage you to do your best to return.

I will be updating this post later this evening with a form for people to fill out if they are currently outside the U.S. with an H-1B visa. We want to be able to follow up with each individual and provide support and guidance as they try to return within the next 28 hours.

The proclamation does not impact any other visa statuses.

There is other content about the pause in processing H-1B petitions for individuals who are outside the U.S. At this time, we do not interpret this to immediately impact extensions of H-1B status or changes of status to H-1B as long as you are currently in the U.S. We’ll share more about that later.

Google:

We are reaching out with an urgent update regarding international travel for individuals on H-1B visas.

A Proclamation is scheduled to take effect this Sunday at 12:01 AM ET. It introduces significant changes to re-entry procedures for H-1B visa holders currently outside the United States. We continue to review the Proclamation, but the initial advice we have received is that re-entry will require a mandatory payment of $100,000 per petition, which may cause substantial delays or prevent re-entry to the U.S.

What You Need to Know:

If you are currently outside the U.S.:

• If you are currently outside the U.S. with a valid H-1B visa, make plans to return and enter the U.S. before the Proclamation takes effect on Sunday, September 21 at 12:01 am ET (i.e. by this Saturday night).

If you are currently in the U.S.:

• We strongly advise against any international travel if you are in valid H-1B status or need to travel to activate your H-1B visa. You should remain in the U.S.
• Departing the U.S. may result in complications or denial of re-entry under the new policy.

If you are unable to return prior to the deadline in H-1B status: please reach out to go/immigration-help.

We understand this may create challenges, and we are here to support you. We are actively monitoring the situation and will keep you updated as we learn more.

Amazon:

Amazonians,

We’ve reviewed the Presidential Proclamation on H-1B visas that was released today and are actively working to gain greater clarity. Here’s what you need to know right now: The proclamation creates a travel restriction starting September 21, 2025, at 12:01 a.m. EDT (9:01 p.m. PDT tomorrow). After this deadline, individuals cannot enter the U.S. on H-1B status without an additional $100,000 payment associated with their petition. Recommended actions for you to take:

If you have H-1B status and are in the U.S.: Stay in the country for now, even if you have travel planned for the immediate future. We will continue to provide updates as more details are available.

If you have H-4 dependent status: We also recommend you remain in the U.S., though the proclamation doesn’t specifically mention H-4 dependents.

If you have H-1B or H-4 status and are outside the U.S.: Try to return before tomorrow’s deadline if possible. We realize this is short notice but returning soon is advisable and you should make every effort possible to clear U.S. customs before 12:00 a.m. EDT (9:00 p.m. PDT) on Sunday, September 21, 2025.

At this time, if you have an H-1B or H-4 status and are unable to return before the deadline, we advise that you do not attempt to enter the U.S. until further guidance is provided.

Large tech companies have responded to President Donald Trump’s dramatic changes to H-1B visa applications by telling employees with those visas to remain in the United States for now.

Fast Company ran a contrarian take about AI from entrepreneur/thought leader Faisal Hoque, who argues there's three AI bubbles. The first is a classic speculative bubble, with asset prices soaring above their fundamental values (like the 17th century's Dutch "tulip mania"). "The chances of this not being a bubble are between slim and none..." Second, AI is also arguably in what we might call an infrastructure bubble, with huge amounts being invested in infrastructure without any certainty that it will be used at full capacity in the future. This happened multiple times in the later 1800s, as railroad investors built thousands of miles of unneeded track to serve future demand that never materialized. More recently, it happened in the late '90s with the rollout of huge amount of fiber optic cable in anticipation of internet traffic demand that didn't turn up until decades later. Companies are pouring billions into GPUs, power systems, and cooling infrastructure, betting that demand will eventually justify the capacity. McKinsey analysts talk of a $7 trillion "race to scale data centers" for AI, and just eight projects in 2025 already represent commitments of over $1 trillion in AI infrastructure investment. Will this be like the railroad booms and busts of the late 1800s? It is impossible to say with any kind of certainty, but it is not unreasonable to think so. Third, AI is certainly in a hype bubble, which is where the promise claimed for a new technology exceeds reality, and the discussion around that technology becomes increasingly detached from likely future outcomes. Remember the hype around NFTs? That was a classic hype bubble. And AI has been in a similar moment for a while. All kinds of media — social, print, and web — are filled with AI-related content, while AI boosterism has been the mood music of the corporate world for the last few years. Meanwhile, a recent MIT study reported that 95% of AI pilot projects fail to generate any returns at all. But the article ultimately argues there's lessons in the 1990s dotcom boom: that "a thing can be hyped beyond its actual capabilities while still being important... When valuations correct — and they will — the same pattern will emerge: companies that focus on solving real problems with available technology will extract value before, during, and after the crash." The winners will be companies with systematic approaches to extracting value — adopting mixed portfolios with different time horizons and risk levels, while recognizing organizational friction points for a purposeful (and holistic) integration. "The louder the bubble talk, the more space opens for those willing to take a methodical approach to building value." Thanks to Slashdot reader Tony Isaac for sharing the article.

Read more of this story at Slashdot.

All the fawning by tech CEOs wasn’t enough to convince Donald Trump to back off his crusade against immigrants. Yesterday the president announced that the government would be adding a $100,000-a-year fee on all H-1B visas in an effort to discourage their use. 

While many industries make significant use of the H-1B program to attract highly skilled foreign workers, the tech industry is particularly reliant. Amazon has roughly 14,000 H-1B workers across its multiple entities, far more than any other company according to data from the federal government. But Google, Meta, Microsoft, Apple, and Tata Consultancy (a major IT services firm) each have more than 4,000 employees working on H-1B visas. 

The fee will only apply to new applicants and it’s likely to face legal challenges, but even just the specter of this change appears to have some companies scrambling. There are reports that Microsoft and Amazon issued internal memos advising any workers currently abroad that operate on a visa to return to the US before the new fees kick in at midnight tonight. When asked, Microsoft declined to comment on the leaked memo or the changes to the H-1B program. Unsurprisingly, tech companies have already been warning those working on visas not to leave the US for fear that they might not be able to return.

Broadly when the White House talks about attracting the “top, top people” to the US, it seems they’re talking about wealth not skill. It also unveiled a so-called “gold card” program that Commerce Secretary Howard Lutnick will replace the existing EB-1 and EB-2 visa programs. Those programs are for people of “extraordinary ability” (often artists, athletes, educators, and executives) or those with advanced degrees in competitive fields. The replacement program demands that applicants “prove [their] exceptional value to the United States of America by contributing a million dollars.”

Under the gold card potential immigrants would pay $1,000,000 as part of a fast-tracked application process, and that fee could climb to $2,000,000 if the person was sponsored by a company for employment. Clearly this new program would favor wealth over actual skills, though the Trump administration claims (without any data to back it up) that it will raise over $100 billion that it will use to pay down the debt and lower taxes. 

Of course, with the national debt currently exceeding $37 trillion, and the federal government expected to add more than $2 trillion in 2025, any revenue raised by the gold card program or fees on H-1B visas would be insignificant.

Updated September 20th: Added response from Microsoft.

Micro- and nanoplastic particles "infiltrate all systems of the body, including the brain," notes the University of Rhode Island, "where they can accumulate and trigger Alzheimer's-like conditions, according to a new study by researchers in the University of Rhode Island College of Pharmacy." ScienceDaily shares the announcement: After a previous study that showed how microplastics can infiltrate all systems of the body — including the blood-brain barrier, which protects the brain from harmful substances as small as viruses and bacteria — University of Rhode Island pharmacy assistant professor Jaime Ross expanded the study to determine the brain health impacts of the plastic toxins. Her findings indicate that the accumulation of micro- and nanoplastics in the brain can lead to cognitive decline and even Alzheimer's disease, especially in those who carry genetic risk factors. Ross' latest study, published recently in the journal Environmental Research Communications, examined mice that had been genetically modified to include the naturally occurring gene APOE4, a strong indicator of Alzheimer's risk making people 3.5 times more likely to develop the disease than those who carry the APOE3 variant of the gene that is passed from parents to offspring... Ross and her team exposed two groups of mice — one with the APOE4 variant and one with APOE3 — to micro- and nanoplastics in their drinking water over a period of three weeks. The tiny particles from polystyrene — among the most abundant plastics in the world, found in Styrofoam take-out containers, plastic cups and more — infiltrated the mice' organs, including the brain, as expected... Ross' team then ran the mice through a series of tests to examine their cognitive ability, beginning with an open-field test, in which researchers put a mouse in a chamber and allow it to explore at will for 90 minutes. Ordinarily, a mouse will hug the walls, naturally attempting to hide from potential predators. However, after microplastic exposure, the APOE4 mice — especially the male mice — tended to wander more in the middle of the chamber and spend time in open space, leaving themselves vulnerable to predators... The results are concerning enough to warrant further study into the cognitive decline caused by exposure to micro- and nanoplastics, which are among the most prominent environmental toxins to which people are routinely exposed... Ross is continuing to expand her research into the topic and encourages others to do so, in the hope of leading to better regulation of the toxins.

Read more of this story at Slashdot.

"OpenAI's video generation tool, Sora, can create high-definition clips of just about anything you could ask for..." reports the Washington Post. "But OpenAI has not specified which videos it grabbed to make Sora, saying only that it combined 'publicly available and licensed data'..." With ChatGPT, OpenAI helped popularize the now-standard industry practice of building more capable AI tools by scraping vast quantities of text from the web without consent. With Sora, launched in December, OpenAI staff said they built a pioneering video generator by taking a similar approach. They developed ways to feed the system more online video — in more varied formats — including vertical videos and longer, higher-resolution clips... To explore what content OpenAI may have used, The Washington Post used Sora to create hundreds of videos that show it can closely mimic movies, TV shows and other content... In dozens of tests, The Post found that Sora can create clips that closely resemble Netflix shows such as "Wednesday"; popular video games like "Minecraft"; and beloved cartoon characters, as well as the animated logos for Warner Bros., DreamWorks and other Hollywood studios, movies and TV shows. The publicly available version of Sora can generate only 20-second clips, without audio. In most cases, the look-alike scenes were made by typing basic requests like "universal studios intro." The results also showed that Sora can create AI videos with the logos or watermarks that broadcasters and tech companies use to brand their video content, including those for the National Basketball Association, Chinese-owned social app TikTok and Amazon-owned streaming platform Twitch... Sora's ability to re-create specific imagery and brands suggests a version of the originals appeared in the tool's training data, AI researchers said. "The model is mimicking the training data. There's no magic," said Joanna Materzynska, a PhD researcher at Massachusetts Institute of Technology who has studied datasets used in AI. An AI tool's ability to reproduce proprietary content doesn't necessarily indicate that the original material was copied or obtained from its creators or owners. Content of all kinds is uploaded to video and social platforms, often without the consent of the copyright holder... Materzynska co-authored a study last year that found more than 70 percent of public video datasets commonly used in AI research contained content scraped from YouTube. Netflix and Twitch said they did not have a content partnership for training OpenAI, according to the article (which adds that OpenAI "has yet to face a copyright suit over the data used for Sora.") Two key quotes from the article: "Unauthorized scraping of YouTube content continues to be a violation of our Terms of Service." — YouTube spokesperson Jack Malon "We train on publicly available data consistent with fair use and use industry-leading safeguards to avoid replicating the material they learn from." — OpenAI spokesperson Kayla Wood

Read more of this story at Slashdot.