The blast went off at a parking lot outside the police building in Kandahar, a local official said. Seven people were killed, and least 19 were wounded, he added. In the north, meanwhile, Afghan police said that an American soldier shot and killed an Afghan guard at a U.S. base.

The attack along a gas pipeline in the country's Sinai peninsula disrupted exports to neighboring Israel and Jordan. The blast that took place Sunday at dawn is the 12th successful attack on the line since the popular uprising that ousted longtime Egyptians leader Hosni Mubarak in February last year.

Some highly improbable events lately have embarrassed the host states in the presidential nominating process, including Nevada, which held its caucus Saturday night.

All caucus sites have now closed in Nevada, and based on actual vote returns NPR says Mitt Romney is the winner, followed by Newt Gingrich in second place followed by Ron Paul and Rick Santorum. This is Romney's second straight triumph over a field of rivals suddenly struggling to keep pace.

Greece is under heavy pressure from its creditors to implement further austerity and structural measures if it wants to get a second, euro130 billion ($171 billion) bailout, and avoid bankruptcy.

Despite Mitt Romney's time as governor, his previous presidential run and quite a few years in the spotlight, many people still feel they don't know much about him. The clean-cut, buttoned-up candidate is notoriously quiet about his private life, and his former colleagues and friends haven't revealed much, either.

Sales of reclining chairs and sofas are as hot as New York Giants receiver Victor Cruz's touchdown dance. Or, for you New England Patriots fans, as popular as star tight end Rob Gronkowski's sprained ankle.

Since the early a.m., U.S. Park Police have been moving into a park near the White House where the Occupy D.C. movement has been encamped for months. Some officers are on horseback and dressed in riot gear, but there haven't been any major clashes so far.

Russian researchers in Antarctica are on the verge of piercing a hole through two miles of ice into an ancient lake, untouched by the light of day for some 20 million years. But it'll be a delicate process to break through without disturbing the pristine waters. Guest host David Green speaks with Antarctic researcher John Priscu about the process.

In Syria, the death toll is rising after what activists and opposition leaders are calling a massive offensive by pro-government troops in the city of Homs. Activists say at least 250 have been killed in what may be the single most violent day since Syria's anti-government uprising began in March.

Sturgeon have been swimming around for more than 200 million years, but their eggs are sought after for caviar. This week, the National Marine Fisheries Service placed the Atlantic sturgeon on its endangered species list. Guest host David Greene speaks with Dr. Ellen Pikitch, executive director of the Institute for Ocean Conservation Science at Stony Brook University.

Though most people will never attend a single Super Bowl, there are three men who have seen them all. Don Crisman and Larry Jacobson are part of a group that calls itself the "Never Missed a Super Bowl Club," and they have no plans to end the streak any time soon. Guest host David Greene catches up with them as they prepare for Sunday's game in Indianapolis.

As the primary season pushes westward, voters in big Western states share what they like and want, plus why they feel they're a different kind of electorate.

In the last decade, population growth in Western swing states outpaced the national average, according to David Damore, a professor of political science at the University of Nevada, Las Vegas. With the Nevada Republican caucus underway, guest host David Greene talks with Damore about the electoral shift and the issues potential voters in the region view as priorities.

In an about-face, the Susan G. Komen for the Cure foundation announced Friday that it is not cutting off funding for Planned Parenthood. Komen is one of the nation's most prominent breast cancer groups. They came under intense criticism for their initial decision to cut off some funding for Planned Parenthood. Guest host David Greene talks with NPR's Julie Rovner and Rob Stein, who have been covering the story.

Residents of a Chinese village who rebelled against corrupt local officials have been choosing an election committee. Some observers are highlighting the unusually open and fair voting process, but there are villagers who think their struggle is far from over. Guest host David Greene checks in with NPR's Louisa Lim in Beijing.

The Chinese automaker JAC unveiled their latest design this week, and it bears a rather notable resemblance to the Ford F-150. Though the engine is much smaller, the JAC 4R3 will go on sale across China and in Africa and Latin America, after its debut at the Beijing motor show in April.

One employer just starting to come back from the brink is Majestic Yachts Incorporated, a houseboat manufacturer in Kentucky. Guest host David Greene checks back in with the CEO, Jim Hadley. He last spoke to Hadley in February 2009 as part of NPR's First 100 Days Project about the impact of the recession.

The top 10 teams in men's college basketball are mostly the usual suspects, Kentucky, North Carolina and the like. One team no one expected has snuck into the polls this week: the Murray State Racers. Guest host David Greene is joined by Ricky Martin, the sports editor of the Murray Ledger-Times.

Opponents of Russia's Prime Minister Vladimir Putin marched through the streets of Moscow Saturday in another large demonstration against alleged voting fraud. The protest is seen as a test both for the opposition and Putin, ahead of March's presidential election. Guest host David Greene gets the latest from NPR's Corey Flintoff in Moscow.