When the fourth-graders in Mrs. Marlem Diaz-Brown's class returned to school on Monday, they were tasked with writing their first essay of the year. The topic was familiar: Hurricane Irma.

By Wednesday, they had worked out their introduction and evidence paragraphs and were brainstorming their personal experiences. To help them remember, Mrs. D-B had them draw out a timeline — starting Friday before the storm. Then, based on their drawings, they could start to talk about — and eventually, write about — what they experienced.

For the first time, scientists have edited the DNA in human embryos to make a fundamental discovery about the earliest days of human development.

By modifying a key gene in very early-stage embryos, the researchers demonstrated that a gene plays a crucial role in making sure embryos develop normally, the scientists say.

The massive earthquake rattled through Mexico City at about 1 p.m. local time Tuesday, razing buildings and filling the air with thick clouds of dust. As residents left their offices and homes, dozens of which sustained severe damage or collapsed entirely, the sun was glaring high in the sky.

It was midday, and the children were still in school.

The Federal Reserve on Wednesday said it will hold short-term interest rates steady for the time being. But the central bank said that in October it will begin to unwind the extraordinary stimulus it used to battle the Great Recession.

Fed Chair Janet Yellen has said the process will be gradual. But over the long run, the plan will put upward pressure on consumer interest rates, including for car loans and mortgages.

Early Wednesday, Spanish police raided government offices in Catalonia and detained at least a dozen separatist leaders — just 10 days before a planned referendum vote on Catalonian independence.

Catalonia, a region in northeast Spain, has its own language and culture. Separatists have long advocated for independence; a vote in 2014 overwhelmingly supported splitting away from Spain, although turnout was low.

Madrid did not recognize that vote, calling it illegal — and considers the upcoming referendum, slated for Oct. 1, to be equally unconstitutional.

A dispute over a $75 speeding ticket has climbed through the levels of Iowa's court system, reaching the lofty heights of the Iowa Supreme Court for oral arguments.

Marla Leaf got a speeding ticket because a camera allegedly caught her driving 68 mph in a 55-mph zone on an interstate freeway through the city of Cedar Rapids in February 2015.

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TERRY GROSS, HOST:

Syrian government troops and allied militias are locked in a race against rebels backed by the United States for control of Deir ez-Zor, an oil-rich province that will give whoever governs it greater influence in the country's wider civil war.

Government soldiers and supporting militias have now crossed the Euphrates River, which had served as an informal dividing line between them and the U.S.-backed Syrian Democratic Forces (SDF) as they waged separate offensives against ISIS in the area.

Comedian Jimmy Kimmel thwacked the latest Republican health care proposal Tuesday night after one of the senators sponsoring the bill invoked Kimmel's name.

Sen. Bill Cassidy, R-La., touted Tuesday on Capitol Hill that his plan passes the "Jimmy Kimmel test."

How 3 Rickshaws Won A Million Dollar Prize

Sep 20, 2017

On a stage at the United Nations headquarters in New York City, the young executives of six start-up companies made their final, feverish bids to win the coveted Hult Prize. Each had formed and launched business ideas over the last year that would try to solve this year's Hult Prize challenge – improving the well-being of at least one million refugees over the next five years.

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