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Say the words "crop insurance" and most people start to yawn. For years, few nonfarmers knew much about these government-subsidized insurance policies, and even fewer found any fault with them. After all, who could criticize a safety net for farmers that saves them from getting wiped out by floods or drought?

"First they ate their horses, and then fed upon their dogs and cats, as well as rats, mice and snakes."

So says James Horn of the historical group Colonial Williamsburg, paraphrasing an account by colony leader George Percy of what conditions were like for the hundreds of men and women stranded in Jamestown, Va., with little food in the dead of winter in 1609.

They even ate their shoes. And, apparently, at least one person.

Bolivian President Evo Morales expelled the U.S. Agency for International Development from his country, accusing it of undermining his government.

"We have decided to expel USAID from Bolivia," Morales said in a May Day speech outside the presidential palace in La Paz.

He said he'd ordered the country's foreign minister, David Choquehuanca, to notify the U.S. Embassy of the decision.

This week, major retailers including Wal-Mart, Gap and others met with labor activists in Germany, hoping to hammer out a deal to improve working conditions in Bangladesh.

The meeting came less than a week after a devastating building collapse in the Bangladeshi capital, Dhaka, killed more than 400 workers. At the meeting, activists pushed retailers who use factories in Bangladesh to start spending their own money to make those workplaces safer.

Nearly half the people now in the U.S. illegally didn't climb walls, wade across the Rio Grande or trek through the desert to get here. They arrived legally, with tourist or student visas. And when those visas expired, they just never left.

Like the rest of the 11 million undocumented people in the United States, they are part of the underground economy and the government doesn't know where they are. The Senate immigration bill now before Congress tries to address this problem — though not as richly as it does border security.

Two years ago, a landmark study found that having Medicaid health insurance makes a positive difference in people's lives.

Backers of the program have pointed to that study time and again in their push to encourage states to expand the program as part of the federal health law.

In South Africa, controversial images of a frail and ashen Nelson Mandela being visited by South Africa's current president aired on national television this week. Some people claimed it was a political publicity stunt.

The footage is fueling fresh debate about what is proper and what constitutes invasion of privacy regarding the ailing, 94-year-old former president and anti-apartheid legend.

President Jacob Zuma, accompanied by two other top officials of the governing ANC party, visited Mandela at his Johannesburg home on Monday.

Mutations on a single gene appear to increase the risk for both an unusual sleep disorder and migraines, a team reports in Science Translational Medicine.

The finding could help explain the links between sleep problems and migraines. It also should make it easier to find new drugs to treat migraines, researchers say.

And for one member of the research team, Emily Bates, the discovery represents a personal victory.

President Obama has said that the use of chemical weapons could change the U.S. response to the Syrian civil war. But why this focus on chemical weapons when conventional weapons have killed tens of thousands in Syria?

The answer can be traced back to the early uses of poison gas nearly a century ago.

In World War I, trench warfare led to stalemates — and to new weapons meant to break through the lines.

During the housing bust, taxpayers were forced to bail out mortgage giants Fannie Mae and Freddie Mac. But thanks to the real estate recovery, Fannie Mae could end up paying tens of billions of dollars back to the Treasury this summer.

That's just one of the factors behind a better bottom line for the federal government. This week, the Treasury Department announced it will pay down some of its debt for the first time in six years.