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The uprisings of the Arab Spring unleashed a new political force in the region — Salafis. These ultra-conservative Muslims aspire to a society ruled entirely by a rigid form of Islamic law. Their models are the salaf, or ancestors, referring to the earliest Muslims who lived during the lifetime of the Prophet Muhammad.

To their critics, the Salafis are religious fanatics who are trying to drag the region back to 7th-century Arabia. But the Salafis maintain that they are offering the purest alternative to the dictatorships that have long dominated the region.

With recreational marijuana now legal in Colorado, small-scale pot shops will open up soon in places like Denver and Boulder. But that's not the only business that could get a boost: Large-scale commercial farmers may also be in line to benefit.

Why? When Colorado voters legalized marijuana last November, they also legalized hemp.

Some children's book illustrators might not have gotten a lot of sleep over the weekend. That's because they might have been wondering if this could be the year they win one of the grand prizes of children's literature: the Randolph Caldecott Medal.

This year is the 75th anniversary of the Caldecott, which is given to the most distinguished children's picture book of the year. The winner is being named Monday morning at a meeting of the American Library Association.

In California in the early 1980s, a cracked tooth sent Mike Williams to the dentist's office.

When Williams asked to see the tooth, the dentist said he had a mirror but that there was no camera or anything to show people the insides of their mouths. So, Williams invented one: the first intraoral camera.

His invention was a big success, and it led to other medical technology ventures that made him millions of dollars. Williams' career as an inventor and entrepreneur took off, but it wouldn't last.

The weekends on All Things Considered series Movies I've Seen A Million Times features filmmakers, actors, writers and directors talking about the movies that they never get tired of watching.

The movie that rapper-actor Common, whose credits include Brown Sugar, American Gangster, Just Wright and LUV — currently playing in theaters — could watch a million times is John Landis' Coming to America.

In 1962, a grisly double murder on a deserted stretch of desert rocked a small community outside Phoenix.

A young couple had been shot to death in a case that stumped Maricopa County investigators. Then, something happened that should have cracked it wide open: A man named Ernest Valenzuela confessed to the crime. But police didn't pursue the lead, just one misstep in an investigation and eventual trial that were rife with irregularities.

Mention the recent surge in oil and natural gas production in the U.S. and one word comes to mind for a lot of people: "fracking." Hydraulic fracturing is a controversial technique that uses water, sand and potentially hazardous chemicals to break up rock deep underground to release oil and natural gas.

But there's another technology that is just as responsible for drilling booms happening across the country: horizontal drilling.

Environmental Consequences

"Obama vs. Rambo" may sound like an Onion headline for the gun control debate. But it's actually a must-see matchup for spectators on Turkey's Aegean Coast. The competitors? Two male, or bull, camels.

The biggest event of Turkey's camel wrestling season takes place each year in the town of Selcuk, near the ancient ruins of Ephesus.

On the main road into the Mexican town of Ayutla, about 75 miles southeast of Acapulco, about a dozen men cradling shotguns and rusted machetes stand guard on a street corner. Their faces are covered in black ski masks.

The men are part of a network of self-defense brigades, formed in the southern state of Guerrero to combat the drug traffickers and organized crime gangs that terrorize residents.

The brigades have set up roadblocks, arrested suspects and are set on running the criminals out of town.

Taking Control

In the early 2000s, the get-rich-quick scheme of choice for young college dropouts was poker — and not your grandfather's poker, with clinking chips on green felt tables. Online poker. For a few years it was a national obsession for a generation of young men who grew up playing hours and hours of video games.

Many of these players couldn't get into casinos because they were underage, but they used their brains and introductory statistics courses to rake in millions, often playing 10 or more games simultaneously on huge computer monitors.

The weekends on All Things Considered series Movies I've Seen A Million Times features filmmakers, actors, writers and directors talking about the movies that they never get tired of watching.

For actor Jeffrey Wright, whose credits include Basquiat, Syriana, W. and Broken City (currently playing in theaters) — the movie he could watch a million times is Francis Ford Coppola's Apocalypse Now.

Residents of Newtown, Conn., where 20 children died in December's school shootings, marched alongside other supporters of gun control at a rally on the National Mall on Saturday.