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Good evening. Here’s the latest.

1. Europe’s migration crisis took a gruesome turn, as Austrian authorities examining an abandoned truck found the bodies of up to 50 people inside. The discovery deepened worries over the harsh business of human trafficking and the desperation of migrants and refugees.

2. All the world’s major stock markets rallied, and U.S. stocks regained most of the ground lost in this week’s turbulence. Analysts suggested that investors were adjusting to a new normal of slower growth for China.

Both the Dow and the S.&P. 500 were up by more than 2.25 percent, and crude oil futures made a 10 percent jump, trading above $42 a barrel in New York.

3. President Obamatraveled to New Orleans to remember the devastating flooding after Hurricane Katrina 10 years ago and to press the case that the federal government can use crisis to rectify longstanding wrongs. Rebuilding, he said in the once-devastated Lower Ninth Ward, was not to restore the city, but “to build a city as it should be.”

4. Colleagues of the two journalists killed by a fired TV reporter in Virginia held a moment of silence. And the father of one of the victims, Alison Parker, channeled his grief into calls for “sensible laws to make sure crazy people can’t get guns,” saying, “How many Alisons will it take?”

5. The Jamaican runner Usain Bolt owned the 200 meters at the world championships in Beijing, finishing in this year’s best time, 19.55 seconds. He was taking a triumphant lap for the replay of his golds in the 2008 Olympics in the same stadium — until a cameraman accidentally tackled him with a Segway.

6. The National Labor Relations Board made it easier for unions to bargain for higher wages and benefits, ruling that workers at fast-food chains and other franchises could negotiate with parent corporations instead of individual businesses. “It is difficult to imagine a more significant decision by the N.L.R.B. in the last 35 years,” said a labor-oriented lawyer.

7. Hillary Rodham Clinton’s admission that using her personal email while secretary of state “wasn’t the best choice” did little to ease Democratic leaders’ concerns that the issue is clouding her presidential campaign. “They’ve handled the email issue poorly, maybe atrociously, certainly horribly,” said one.

8. Donald Trump made a swing through South Carolina, reviving the Nixon-era term “silent majority” and answering an insult in Spanish-language media by asking a woman to examine his scalp to verify that he doesn’t wear a toupee. He also said he would decide shortly whether to pledge to support the ultimate Republican presidential nominee.

9. Planned Parenthood defended itself against allegations of illegal profiteering from fetal tissue drawn from videos released by an anti-abortion group. An analysis commissioned by Planned Parenthood found that the videos had been manipulated and could not “be relied upon for any official inquiries.”

10. These researchers tried to recreate 100 published psychology studies, but, in another blow to scientific credibility, found that fewer than half could be reproduced. Fraud wasn’t the problem, they said, just weak evidence.

11. Good news:Los Angeles has deeply cut its water use for two months, beating the parched state’s mandatory targets and showcasing residents’ efforts to conserve, down to how they brush their teeth. “This is a great achievement,” said a water official.

Sinkhole Swallows Five People in China

12. Watch: This could almost serve as a metaphor for China’s stock markets over the last week. A sinkhole suddenly opened at a bus stop in Harbin, China. A security camera captured the moments.

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