Mark Memmott

"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 timekeepers at the International Telecommunication Union's Radiocommunication Assembly, who were supposed to decide this week whether to keep or eliminate the leap second, have decided to take some more time to decide.

Three years, apparently, the BBC reports.

The experts, it says, "were unable to reach a consensus, so moved the matter to a meeting in 2015."

A rare four-volume set — John James Audubon's Birds of America — stands a good chance of becoming the most expensive such books ever auctioned on Friday.

For decades, until 2010, someone appeared at Edgar Allan Poe's grave site in Baltimore before dawn on Jan. 19 — his birthday.

The mysterious visitor, who was never identified, would leave behind three roses and a half-filled bottle of cognac as a tribute to the man who wrote The Raven, The Fall of the House of Usher and other classic poems and tales.

Last night, there was no visit.