AMNA NAWAZ: In the day's other headlines: A federal judge has reportedly ruled that former Vice President Mike Pence must testify in the Justice Department's January 6 investigation.

News accounts say he's ordered to appear before a federal grand jury.

It's unclear if he will appeal.

Mr. Pence acted as Senate president on January 6 of 2021 counting electoral votes.

He argues that, under the Constitution, he cannot be questioned about any legislative duties.

Across France today, hundreds of thousands of people turned out again to protest raising the retirement age to 64.

Demonstrations were largely peaceful, but bands of leftist militants battled police in Paris and other cities.

Special correspondent Ross Cullen is in Paris, and has this report.

ROSS CULLEN: Paris is known as the City of Light, but today, in parts of the French capital, it was the city alight.

Protesters clashed with police and thousands of people flooded the famous Place de la Republique in the heart of the city.

Riot police fired tear gas to disperse the crowd after some black-clad protesters, the so-called Black Bloc, pelted police with stones.

Paris Police Chief Laurent Nunez: LAURENT NUNEZ, Paris Police Chief (through translator): There is a tense situation, but it's not an insurrection.

Law enforcement is present.

They will still be president through the day to maintain republican order.

ROSS CULLEN: Though the vast majority of protesters were peaceful, their anger was no less fierce.

MIMOSA EFFE, Protester (through translator): We're here to make the government give in with regard to pension reform.

There is massive anger.

MARGOT BERNARD, Protester (through translator): I can see colleagues although they're less than 60 years old, they already have physical difficulties.

So you can't even imagine what its like working until 64 years old.

That's not possible.

ROSS CULLEN: Rail traffic was disrupted with hour-long delays, and the iconic Eiffel Tower stood closed today.

Its staff joined the nationwide strike.

Protesters also blocked entry to the Louvre.

The protests have intensified over the last two weeks since the government used special constitutional powers to bypass Parliament on a final vote of the contested pension changes.

After more than two months of demonstrations, there could be some movement from the opposing sides.

The unions have written a joint letter to the president calling for mediation.

And the prime minister says she is ready for talks with the opposition next week.

But the protests show no signs of dying down.

For the "PBS NewsHour," I am Ross Cullen in Paris.

AMNA NAWAZ: There was one sign of relief for Parisians.

Garbage collectors suspended a strike that has left mounds of trash on the streets.

There are growing signs that Ukraine's military is revving up for a spring offensive.

The defense minister said today his forces will soon begin using modern battle tanks delivered by Germany, Britain, and others.

And, in Washington, U.S. Defense Secretary Lloyd Austin told a Senate hearing that Russia is having to rely on older Soviet-era tanks.

LLOYD AUSTIN, U.S. Secretary of Defense: The Ukrainians have inflicted significant casualties on the Russians, and they have depleted their inventory of armored vehicles in a way that no one would have ever imagined.

And so now we see Russia reaching for T-54 and T-55 tanks because of the level of damage that the Ukrainians have inflicted on them.

AMNA NAWAZ: Meanwhile, today, Ukraine's President Zelenskyy walked trenches in the Sumy region of Northern Ukraine, where Russian forces were driven off last April.

Lawmakers in Scotland today confirmed Humza Yousaf as first minister.

He is the first person of color to lead the Scottish government and the first Muslim to lead any Western democracy.

Yousaf was elected Monday to head the ruling Scottish National Party.

He supports efforts to gain Scotland's full independence from the United Kingdom.

In Mexico, a late-night fire killed at least 40 people at a migrant detention center.

Mexican officials say migrants fearing deportation burned mattresses at the facility in Ciudad Juarez just across from El Paso, Texas.

Ambulances, fire crews, and morgue vans swarmed the scene.

Dozens of men and women from Central and South America had been held there, and relatives waited for news.

EMILIO JOSE, Husband of Detainee (through translator): Nobody tells me anything.

I ask, and they give us a rude answer or don't give us any information.

I want to know what is happening because I worry about my wife.

I want to know what is going to happen to her.

Are they going to deport all of them?

AMNA NAWAZ: Many of those at the shelter were waiting for action on requests to be granted asylum in the U.S.

The World Health Organization is out with new COVID-19 vaccine guidance, and it's suggesting an extra shot for high risk groups.

The recommendations say older adults or people with various risk factors should get another booster six to 12 months after their last vaccination.

The WHO also says children and young adults who are healthy may not need an additional dose.

Back in this country, an appeals court in Maryland reinstated the murder conviction of Adnan Syed, whose case was chronicled in the podcast "Serial."

The court ruled the murder victim's family had no proper notice of the hearing that led to Syed's release last September.

He remains free, pending a new hearing.

Federal prosecutors have unveiled a new indictment against Sam Bankman-Fried, founder of the bankrupt FTX cryptocurrency exchange.

It charges that he directed at least $40 million in bribes to Chinese government officials to unfreeze some of his business assets.

Bankman-Fried now faces a total of 13 charges.

And on Wall Street, stocks edged slightly lower on a relatively quiet day.

The Dow Jones industrial average lost about 38 points to close at 32394.

The Nasdaq fell 52 points.

The S&P 500 slipped six.

Still to come on the "NewsHour:: top banking officials testify before Congress on the industry's recent turmoil; Vice President Harris looks to strengthen U.S. ties and investment in Africa; state legislatures move to limit teens' access to social media; plus much more.