Autopsies: Powell boys suffered 'chop injuries' (AP)

US closes Syrian embassy as diplomacy collapses (AP)

Deeper Iran sanctions; US targets its central bank (AP)

Staff to be removed during probe at LA school (AP)

Romney works to fend off Santorum challenge (AP)

Tea party: Warming or resigned to Mitt Romney? (AP)

'Halftime in America' ad creates political debate (AP)

Randy Travis arrested for public intoxication (AP)

Palestinians take step toward unity (AP)

Belichick: Giving Giants TD gave Pats best chance (AP)

Obama campaign to support Super Pac fundraiser (Reuters)

Greek leaders face crunch talks, unions strike (Reuters)

Syrian forces attack Homs on eve of Lavrov visit (Reuters)

With economy improving, Obama would beat Romney: poll (Reuters)

Insight: Two firms flourish in frenzied MF Global aftermath (Reuters)

Markets edge down as Greece wrangling tempers momentum (Reuters)

Analysis: Euro zone strugglers lack innovative knack (Reuters)

U.S. closes embassy in Syria, vows further pressure (Reuters)

Chrysler Super Bowl commercial: Is Clint Eastwood a Democrat? (The Christian Science Monitor)

Madonna half time show: What's a network to do when performers behave badly? (The Christian Science Monitor)