Amazon, Google, and Microsoft warn employees to rush back to the US

Here is a 181-word summary of the key points from the news article: Major tech companies like Amazon, Google, and Microsoft are urgently advising their employees with H-1B visas who are currently outside the U.S. to immediately return before a new travel restriction takes effect on September 21st at 12:01 AM ET. The companies have sent out internal memos explaining that the new Presidential Proclamation will prohibit H-1B visa holders from re-entering the U.S. unless they pay an additional $100,000 fee per petition. As the change is structured as a travel restriction, employers are concerned workers could be denied re-entry without the fee. The memos instruct H-1B and H-4 dependent employees currently in the U.S. to remain in the country and avoid any international travel for now. For those outside the U.S., the companies strongly recommend they make arrangements to return before the Sunday deadline, despite the short notice. The tech giants say they are still reviewing the full details and will provide more guidance as the situation evolves. Microsoft, Amazon, and Google did not provide comments for the original news report.