Now we know the Final Four teams in the 2012 NCAA Division I men's basketball championship:

-- Kansas.

-- Kentucky.

-- Louisville.

-- Ohio State.

So it's time to ask:

The women's Division I tournament, by the way, is down to its Elite Eight.

Good morning.

Our early headlines:

-- Tens Of Thousands Expected Today At Florida Rally For Trayvon Martin .

-- The Arguments Begin: Supreme Court Takes Up Health Care Starting Today.

• 86th Day of 2012 / 280 Remaining
• 86 Days Until Summer Begins

• Sunrise:7:03
• Sunset:7:28
• 12 Hr 25 Min

• Moon Rise:9:01am
• Moon Set:11:39pm
• Moon’s Phase: 15 %

• The Next Full Moon
• April 6 @ 2:20pm
• Full Pink Moon

A rally in Sanford, Fla., today "to demand justice in the Trayvon Martin shooting death," is expected to draw "tens of thousands of people," Orlando's WFTV says.

The rally — one month after the black teen's death — is due to begin at 4 p.m. ET and end with those thousands gathered outside the city's civic center as the Sanford City Commission meets to hear from the 17-year-old Martin's parents.

NPR's Ken Rudin is a fan of using history as a guide to what might happen next when it comes to politics, and this morning he focuses on the 2012 race for the Republican presidential nomination and what lessons we might learn from an earlier battle between GOP contenders.

"A house fire believed to be the worst in Charleston's history claimed its ninth victim Sunday," West Virginia's Sunday Gazette-Mail reports.

According to the newspaper, 7-year-old Bryan Timothy Camp was taken off life support Sunday morning. The fire at the home he lived in with his mother, her boyfriend, an aunt and six other children began around 3:25 a.m. ET on Saturday. Only the aunt survived. The Gazette-Mail says the rental home had no working smoke detectors.

Kazakhstan's Maria Dmitrienko took gold at the Arab Shooting Championships last week in Kuwait. As she stood to hear her national anthem, out blared the parody anthem from the movie Borat. Organizers apologized. They got Serbia's anthem wrong, too.

Britain's Big Ben is technically the giant bell inside St. Stephen's Tower at Parliament. Some members of Parliament want it renamed the Elizabeth tower, in honor of the queen. Jokingly, some suggested the name: Big Beth.

Here's how we'll be following the Supreme Court's three days of oral arguments about the President Obama's health care overhaul law, which as we've previously noted begin today.

As we always try to do when major stories are developing, we'll watch for key moments and pass along the news as soon as possible.

Saying that her husband "loves children, he's like a big kid himself," the wife of the U.S. Army soldier accused of killing 17 Afghan civilians on March 11 has told NBC News that the accusations against Staff Sgt. Robert Bales are "unbelievable to me."

"I have no idea what happened, but he would not ... he loves children, and he would not do that," said Karilyn Bales.