Scott Neuman

Even as Friday's shooting at Sandy Hook Elementary in Newtown, Conn., suggests that more could be done, the whole culture of school security has undergone a revolution since the 1999 Columbine school shooting, experts say.

"Schools are far more secure than they were at the time of Columbine," says Paul Timm, president of RETA Security Inc., a school security consultancy.

For one, he says, "They keep most exterior doors secured, which is something they didn't pay much attention to before."

Sputnik 1 just beeped. China's first satellite, launched more than a decade later, simply radioed a communist anthem back to Earth. So far, North Korea's first satellite appears to be less accomplished.

And that shouldn't be a surprise.

Given the history of first orbital space shots, North Korea's apparent struggle with its mission is fairly typical, says David Akin, an associate professor of aerospace engineering at the University of Maryland.

North Korea's successful rocket launch may conjure up visions of nuclear missiles in the hands of one of the planet's least predictable regimes. But building a satellite launch vehicle doesn't directly translate into an ability to rain warheads on distant enemies.

When clerical workers at the ports of Los Angeles and Long Beach reached an impasse in talks with management over job security last week, they took what has become something of a rare step: They went on strike.

President Obama has yet to make known his choice to replace Secretary of State Hillary Clinton, but plenty of Republicans have made theirs: John Kerry.

And that puts the Massachusetts senator and former Democratic presidential nominee in a bit of a bind. As chairman of the Senate Foreign Relations Committee, he'd normally be one of the loudest voices defending U.N. Ambassador Susan Rice against GOP attacks that she mishandled her role in explaining an attack on the U.S. Consulate in Benghazi. But she's the other top contender for the Cabinet post.