Pledging to do all they can "to encourage and support common sense solutions that make my community and our country safer from similar acts of violence," parents, family and friends of the 20 children and six educators killed in the Dec. 14 mass shooting at a school in Newtown, Conn., just launched Sandy Hook Promise.

Where does the phrase "the whole nine yards" come from? In 1982, William Safire called that "one of the great etymological mysteries of our time."

He thought the phrase originally referred to the capacity of a cement truck in cubic yards. But there are plenty of other theories.

Since her appointment to the Supreme Court in 2009, Sonia Sotomayor has stood out. The nation's first Latina justice is also its most extroverted; not only does she ask far more questions during oral arguments than her predecessor, David Souter, but she also has refused to indulge the court's pose of Olympian detachment. William Rehnquist never threw out the first pitch at Yankee Stadium, and I don't remember Antonin Scalia making an appearance on Sesame Street.

Add this to the list of proposals to overhaul the gun industry: Rep. Adam Schiff, D-Calif., says he will introduce legislation this week to roll back legal immunity for gun manufacturers and dealers.

Schiff tells NPR there's no need for the 2005 law called the Protection of Lawful Commerce in Arms Act to remain on the books. That law gave gun makers, gun dealers and trade groups immunity from most negligence and product liability lawsuits. "Good gun companies don't need special protection from the law," Schiff says, "Bad companies don't deserve it."

At a news conference dominated by discussion of what's expected to be Washington's next big political battle, President Obama insisted Monday that he will not let Republicans tie an increase in the federal government's borrowing limit to negotiations over cuts in future federal spending.

Good morning.

Our early headlines:

-- "As French Claim Gains In Mali, Islamists Vow To Strike Back."

-- "'Biggest Gathering On Earth' Begins In India; Kumbh Mela May Draw 100 Million."

Other stories in the news:

On this fourth day of French military operations aimed at routing Islamist militants in Mali, the al-Qaida-linked rebels are "vowing to drag France into a long and brutal ground war," Reuters reports.

"France has opened the gates of hell for all the French. She has fallen into a trap which is much more dangerous than Iraq, Afghanistan or Somalia," a spokesman for the MUJWA Islamist group told Europe 1 radio, the wire service writes.

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STEVE INSKEEP, HOST:

Good morning, I'm Steve Inskeep, with regrets to Kelly Hildebrandt. She became famous in 2009 for marrying a man with the identical name, Kelly Hildebrandt. Perfect. No anxiety about changing names, and if they chose to hyphenate the kids, it would Hildebrandt-Hildebrandt. But now the Hildebrandts have separated and filed for divorce. Miami's WTVJ quotes Mr. Hildebrandt saying, She's a Florida girl, I'm a Texas guy. They're from different worlds. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.

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STEVE INSKEEP, HOST:

Good morning, I'm Steve Inskeep.

Winning isn't everything but at least you don't have to dance. The mayors of Denver and Baltimore made a friendly wager when their teams met in the NFL playoffs. When Baltimore won in overtime, it was disaster for Denver Mayor Michael Hancock, who must now dance like Ray Lewis. The soon-to-retire Baltimore star does an awkward but enthusiastic sideline dance before games. And we're going to find out soon how well Mayor Hancock moves.

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STEVE INSKEEP, HOST:

Hundreds of thousands of people took to the streets of Paris yesterday to protest government efforts to legalize same-sex marriage. The demonstration was considered one of the largest in years. The government of President Francois Hollande says it will go ahead anyway. NPR's Eleanor Beardsley reports.