Good morning, NBC News readers.

Here's what we're watching today.

'Not afraid to fight': China shoots back after Trump deepens trade war

China shot back on Friday after Trump announced on Twitter that the U.S. would impose an additional 10 percent tariff on $300 billion in Chinese imports starting next month.

The Chinese foreign ministry spokeswoman called Trump's move a "serious violation" and warned Beijing would have to take "necessary countermeasures" if the tariffs were imposed.

The trade war between China and the U.S., the world's two largest economies, has rocked markets across the world for the last year and a half.

Trump's latest move seems to have been borne out of frustration with the lack of progress in trade talks with Beijing.

Lone black Republican in the House says he's out

Texas Rep. Will Hurd, the only black Republican in the House of Representatives, announced Thursday evening he would not be seeking re-election.

He is the sixth GOP member of the House in less than two weeks to announce they would not be running for re-election.

The three-time Congressman was notably one of only four Republicans in the House to vote in favor of a resolution last month that condemned Trump's "racist comments" about four Democratic congresswomen of color.

Meantime, Trump seemed to dial back his attacks on the "the squad" at his campaign rally in Cincinnati last night.

Rep. Will Hurd, R-Texas, said that he would be leaving Congress to work on issues "at the nexus between technology and national security." Bill Clark / CQ-Roll Call file

Clean Water case ferments trouble for craft breweries and environmentalists

Beer is mostly water — more than 90 percent, in some cases. Which is why the craft brewing industry is increasingly concerned about the Trump administration’s attempt to deregulate the 1972 Clean Water Act.

Sixty craft breweries from across the country have joined environmental advocates who are fighting the deregulation attempt in a case before the Supreme Court.

They say that weakening the protections around American waterways directly threatens their livelihoods as well as one of America's favorite drinks.

"We need to protect our water and make sure we have access to clean water to make great beer here in Maine and across the country," one brewer said. Carolyn Figel / for NBC News

The Week in Pictures

An iceberg floats in Disko Bay behind houses during unseasonably warm weather in Ilulissat, Greenland, on Tuesday. Sean Gallup / Getty Images

See more of the most striking images from the last week here.

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Plus

Hours before embattled Gov. Ricardo Rosselló resigns, Puerto Rico has no succession plan.

embattled Gov. Ricardo Rosselló resigns, Puerto Rico has no succession plan. Kennedy family faces tragedy once again: RFK's 22-year-old granddaughter was found dead at the family compound in Hyannis Port, Massachusetts.

once again: RFK's 22-year-old granddaughter was found dead at the family compound in Hyannis Port, Massachusetts. Saudi Arabia has loosened restrictions on women with a new law that will allow them to travel without male consent.

THINK about it

We can’t turn off feelings of embarrassment or failure, but we can change how we process them — and make molehills out of mountains, Sian Beilock, a cognitive scientist and the president of Barnard College at Columbia University, writes in an opinion piece.

Science + Tech = MACH

Potentially habitable "super-Earth" discovered just 31 light-years away.

Live BETTER

Chill out in August with this 31-day yoga routine.

Quote of the day

"We don't want to fight, but we are not afraid to fight."

— Chinese foreign ministry spokeswoman Hua Chunying said in response to the announcement of additional U.S. tariffs on Chinese goods.

One wacky thing

Doctors removed 526 "tooth-like structures" from a 7-year-old boy's mouth in India.

The boy's parents took him to the dentist because they feared a swelling in his jaw might be cancer.

Much to their surprise, the oral pathologists discovered what they described as a "well-defined bag-like mass" full of the unusual teeth.

An X-ray of the boy's mouth from the Saveetha Dental College and Hospital in Chennai, India. Saveetha Dental College and Hospital

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