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Fifty years ago, photographer and folklorist Roland Freeman hitched his hopes to a humble caravan of mule-driven wagons. The Mule Train left the small town of Marks, in the Mississippi Delta, for Washington, D.C. It was part of Martin Luther King Jr.'s last major effort to mobilize impoverished Americans of different races and ethnic backgrounds.

Updated at 11:06 a.m. ET

The Justice Department's internal watchdog agency unveiled a doorstop-sized report Thursday that provides an inflection point — but no closure — in the never-ending war over the 2016 presidential campaign and its aftermath.

A roller coaster derailed at the boardwalk in Daytona Beach, Fla., Thursday night, sending two riders crashing 34 feet to the ground while leaving several others stranded in a roller coaster car, dangling above the ground.

The local fire department says 10 people have been rescued, and six people have been sent to the hospital.

There have been no reports of fatalities, but the fire department could not describe the extent of injuries.

The Daytona Beach Fire Department posted photos and videos of the nighttime rescue of the trapped riders.

The voice of legendary physicist Stephen Hawking is to be broadcast into space after his memorial service on Friday, according to British media outlets.

Specifically, it will be directed toward the nearest black hole. Hawking, who died in March, revolutionized the scientific understanding of black holes — and won the hearts of people across the world with his tireless scientific advocacy.

In the spring of 2014, Eric Abramovitz got the opportunity of a lifetime.

He just didn't know it.

Abramovitz was the victim of a deception that a Canadian judge called "despicable," as he granted Abramovitz $350,000 Canadian dollars (more than $260,000 U.S.) in damages.

If all goes as planned, a long-anticipated ceremony will be held in Fort Worth, Texas on the first official day of summer. It's to mark the nation of Turkey taking possession of its first F-35 jet fighter.

The F-35 is widely considered the world's most advanced and versatile warplane. Not only has Turkey ordered more than 100 of them - it's also part of a nine-nation consortium manufacturing the 300,000 parts that make up Lockheed Martin's 5th-generation stealth fighter.

As Arab airstrikes pummel areas around Hodeidah, backing a Yemeni government push to dislodge Houthi rebels from the country's major Red Sea port, international observers are struggling to respond to the bloodshed — which threatens to exacerbate a desperate situation already deemed the "world's worst humanitarian crisis."

Dr. Jeffrey Lewis (@ArmsControlWonk) is a scholar at the Middlebury Institute of International Studies at Monterey and author of a novel about how a nuclear war with North Korea might begin, The 2020 Commission Report.

The number of people incarcerated in American prisons is the lowest it's been in decades. But a new report from The Vera Institute of Justice, a nonprofit research group that wants to limit mass incarceration in the United States, tells a more complex story.

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