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Hydraulic fracturing gets the spotlight, but without another technology — horizontal drilling — natural gas drilling booms across the country would not be happening now.

The French-led intervention against Islamist rebels is gaining strength. African military chiefs say a minimum of 5,000 regional troops are needed to join the intervention against the rebels.

Bill Macumber, a respected member of his Arizona community, was convicted of a grisly 1962 double murder. Late last year, however, he was released from prison. A new book tells the story of a flawed investigation and legal process that cost Macumber 38 years of freedom.

After inventor Mike Williams lost his business and his marriage, he ended up homeless. Then he found himself in the hospital after he was attacked and beaten in a California park. Dr. Jong Chen helped Williams back to health and back on his feet. Now they're working together on another invention.

The ultra-conservative Muslims, whose influence has grown since the Arab Spring, aspire to a society ruled entirely by Islamic law. But to their critics, the Salafis are religious fanatics who are trying to drag the region back to 7th-century Arabia.

Colorado's vote to approve recreational use of marijuana also legalized its relative hemp, which is grown for food and other everyday uses, not for its high. Large-scale commercial farmers may be in line to benefit, but growing hemp is still illegal under federal law.

To understand how social rules affect the interactions between humans and machines, scientists re-created a famous psychology experiment using robots. What they found is that if robots are nice to us, we're nice to them. If they're not, we "punish" them.

The proposal would include a pathway to citizenship for millions of people now in the United States illegally. Republicans have led the opposition to that change up to now, commonly calling it amnesty.

Eight senators — four Democrats and four Republicans — unveiled principles they say will guide a bipartisan immigration overhaul. It would let undocumented immigrants with no criminal records get probationary legal residency if they pay fines and taxes. Full citizenship might come after other reforms.

Tissue, shredded paper and pressed packing material have not inspired the kind of adoration that leads to a fan base. But then, none offer the delicious sound and sensation of popping.