Six world powers began fresh talks with Iran Friday in a bid to resolve tensions over its controversial nuclear drive, but the United States warned against building up hopes of a breakthrough.

EU foreign policy chief Catherine Ashton and Iran's top nuclear negotiator, Saeed Jalili, led the delegations which convened for the two-day meeting at a seafront Ottoman palace in Istanbul, a Turkish diplomat said.

U.S. President Barack Obama passed the halfway point of his four-year term Thursday and revealed he is already plotting to win a second, boosted by a sudden upswing in popularity.

Obama's spokesman Robert Gibbs divulged the worst-kept secret in Washington, saying that his boss would "likely" ask voters to send him back to the White House in 2012.

South Korean navy commandos Friday stormed a ship hijacked by Somali pirates in the Indian Ocean, rescuing all the crew and killing eight pirates, military officials said.

"Our special forces stormed the hijacked Samho Jewelry earlier today and freed all hostages," said Colonel Lee Bung-Woo, a spokesman for the Joint Chiefs of Staff.

Nine civilians were killed by a roadside bomb in Baghlan province, northern Afghanistan, as they traveled to a wedding on Sunday, police and local officials said.

Six women, two men and a child died in the blast, which happened as the vehicle traveled from Pul-e-Khumri, the provincial capital, to a village in the province, on a road often used by foreign forces.

Former dictator Jean-Claude "Baby Doc" Duvalier has made a surprise return to Haiti in the midst of a political vacuum left by disputed presidential elections.

Returning to his homeland Sunday for the first time after 25 years in the political wilderness, most of them spent in exile in France, Duvalier told reporters at the airport, simply: "I've come to help."

The pope on Friday approved a miracle attributed to Pope John Paul II's intercession and set May 1 as the date for his beatification, an event that will be a major morale boost for a church reeling from a wave of violence against Christians and fallout from the clerical sexual abuse scandal.

Pope Benedict XVI declared in a decree that a French nun's recovery from Parkinson's disease was miraculous, the last step needed for the beloved pontiff's beatification.

Three Bulgarian airline employees, working on a contract for the United Nations in Sudan, were kidnapped in the east African country, the Bulgarian foreign ministry said Thursday.

"A crew of three Bulgarian nationals, working for a Bulgarian airline company operating flights on a U.N. contract, were kidnapped in north Sudan," the ministry said in a statement.

Chrysler Group said Tuesday it plans to build a new sport utility vehicle for Italy's Maserati in North America.

Chrysler/Fiat Chief executive officer Sergio Marchionne said he had approved a plan to build a sport utility vehicle for the ultra-high end Italian luxury brand at the Jefferson North Assembly plant in Detroit.

NASA said Tuesday it will aim to launch the space shuttle Discovery on February 24, after engineers found a way to shore up cracks on the external fuel tank that have delayed its final liftoff.

NASA engineers have been working since November to figure out why cracks were emerging on the 22-foot-long U-shaped aluminum brackets, called stringers, on the shuttle's external fuel tank.

Soldiers rushed to restore calm to parts of central Nigeria on Tuesday after 13 people were reported killed in an attack on a village and unrest flared in other areas, authorities said.

Central Nigeria has seen a wave of violence in recent weeks, including Christmas Eve bomb blasts and reprisal attacks that killed at least 80 people as well as clashes between Christian and Muslim ethnic groups.