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The trouble at West High School started on Monday. That's when students and teachers at the Salt Lake City school noticed something.

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Copyright 2017 NPR. To see more, visit http://www.npr.org/.

AILSA CHANG, HOST:

This week the big story in baseball is pretty sobering. It's about the safety of fans at the ballpark.

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Nasty, brutish and short.

Until about the last decade or so, that is how many of us were accustomed to thinking about Neanderthal life.

But a lot has changed since then, not least of which is the emergence of smoking gun DNA evidence that Neanderthals are, in fact, family.

Now a new study runs counter to earlier thinking by suggesting that Neanderthals reached maturity at about the same rate as modern humans.

President Trump is facing a decision on whether to extend the ban on travelers from six majority-Muslim nations from entering the U.S. This week, acting Homeland Security Secretary Elaine Duke sent the White House her recommendations for "tough and tailored" security vetting, to replace the current ban, which expires Sunday.

Updated 10:10 p.m. ET Fri

Though the brunt of Hurricane Maria has left Puerto Rico, the island's water worries continue. On Friday afternoon, the National Weather Service reported that the Guajataca Dam in the northwest is "failing," causing flash flooding. Buses were trying to evacuate people from the area "as quickly as they can," the service said.

Iran unveiled a new ballistic missile Friday, showing off the weapon during a military parade in Tehran. "When it comes to defending our country, we will ask nobody for their permission," President Hassan Rouhani said.

Compounding Puerto Rico's devastation in the wake of Hurricane Maria is the fact that so much is still unknown. Because most of the island's cellphone sites are out of service and the power grid is down, it has been difficult or impossible to connect with the people who live there — whether from the mainland or from another part of the island.

Atlanta resident Silkia Babilonia, who lives in Atlanta, says that since the storm, she hasn't been able to reach friends and family on the island's west side.

John McCain on Friday imperiled Republicans' latest Affordable Care Act repeal and replace effort when he said he "cannot in good conscience" support the so-called Graham-Cassidy bill. But McCain did also say he could at some point support the substance of his fellow Republicans' proposal.

"I would consider supporting legislation similar to that offered by my friends Sens. [Lindsey] Graham and [Bill] Cassidy were it the product of extensive hearings, debate and amendment," McCain said. "But that has not been the case."

The United Nations General Assembly is in session this week, and the top question on many minds: How will President Trump’s “America First” message mesh with the rest of the world?

Here & Now‘s Jeremy Hobson revisits some of the week’s speeches to see how world leaders are addressing that and other issues.

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