Did slavery have any part in the abduction of hundreds of Nigerian girls? CNN's Jim Clancy reports.

Citing recent attacks, the United States on Wednesday announced that it has suspended operations to the public at its embassy in Sanaa, Yemen.

Going after Boko Haram is the "right thing," but there's a cost, says former CIA Director Gen. Michael Hayden.

While looking for kidnapped girls, Nigeria welcomes dignitaries for the World Economic Forum. Jonathan Mann reports.

Hillary Clinton urges the Nigerian government to accept international help and find the girls abducted by Boko Haram.

Terrorist groups such as Boko Haram prey on girls because they fear them, Malala Yousafzai told CNN's Christiane Amanpour Wednesday, adding her voice to the outcry over the mass kidnappings of Nigerian girls.

Boko Haram militants reportedly kill at least 150 people in northern Nigeria as authorities offer a $310,000 reward to help find girls abducted by the group.

"There is a market for selling humans."

He is the face of terror. A ruthless leader with a twisted ideology. And the sadistic architect of a campaign of mayhem and misery.

Voting began Wednesday in South Africa in the country's first elections since the death of Nelson Mandela.