"Four International Security Assistance Force service members were killed today in eastern Afghanistan by a member of the Afghan National Army," the NATO-led military command in Kabul reports.

While others analyze what Thursday's GOP presidential debate does or doesn't tell us about what may or may not happen Saturday when South Carolina Republicans hold their primary, here's the top news from that four-man clash in Charleston:

The Florida Department of Law Enforcement faced accusations that a breathalyzer was giving inaccurate readings. So it commissioned a study. Fifteen employees consumed more than $300 worth of whiskey, mixers and Doritos, and then used the breathalyzer. Judges are considering whether the study was legitimate.

A frustrated judge in London recently exercised a little-known power: sending police into the street to rustle up jurors. The London Free Press reports lawyers in the case had questioned 130 potential jurors, and were still short. So unsuspecting pedestrians were hauled into court.

David Greene has business news.

Transcript

DAVID GREENE, HOST:

With those stakes high in South Carolina, the political ads are getting more pointed.

As NPR's Brian Naylor reports, the candidates themselves are taking aim less at each other and more at the White House.

BRIAN NAYLOR, BYLINE: The day before the South Carolina primary, the remaining Republican candidates are making their final TV pitches to voters. Here's part of what the Mitt Romney campaign bills as its closing argument.

(SOUNDBITE OF A POLITICAL ADVERTISEMENT)

On the campaign trail, GOP presidential candidate Rick Santorum often discusses his opposition to abortion rights and gay marriage. That message served him well in Iowa with its large contingent of evangelical voters. Christian conservatives are also dominant in South Carolina, which votes Saturday. Santorum hopes to repeat his Iowa performance, but he's been struggling to keep pace in polls.

Renee Montagne has the Last Word in business.

It took George Lucas more than two decades to bring the movie Red Tails to the screen. It was all the way back in the late '80s that the man behind Star Wars and Indiana Jones fell under the spell of another story of adventure, this one with real-life heroes — the African-American fighter pilots of World War II.

Newt Gingrich's swift rise has been fueled by one thing above all — his forceful performances in the debates. And Thursday night, Gingrich was dominant from the start when he got the first question. It was about an explosive television interview with his ex-wife Marianne.