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Good evening. Here’s the latest at the end of Friday.

1. On the war’s anniversary, the U.S. announced more aid for Ukraine and sanctions on Russia.

The Pentagon said it would spend $2 billion to supply Ukrainian troops with drones and other advanced weapons as the first anniversary of Russia’s invasion prompted shows of solidarity from around the world.

The White House unveiled new sanctions on those supporting Russia, joining other Western countries in boosting the war effort as they brace for a prolonged conflict.

In Kyiv, Ukraine’s president, Volodymyr Zelensky, said that his country could defeat Russia this year, as long as Ukraine’s allies remain united “like a fist” and continue to deliver weapons. The war has already done untold damage: Tens of thousands of people have been killed on both sides, and millions of Ukrainians have been made homeless.

Its effects have reverberated around the globe, reshaping alliances and affecting everything from grain prices to energy policy. Over the past year, Zelensky and President Biden have forged a critical partnership that at times has been fraught with friction, according to officials in both camps.

Our correspondents and photographers on the ground recalled moments from the war that are etched in their memory, and images that they can’t forget.

For more: Read the text messages sent by Ukrainians in the first hours of the invasion. They capture the fear, anger and love shared by many at the time.

2. Southern California is getting hit by a rare winter storm.

Strong winds and heavy snow created blizzard conditions over high terrain and mountain passes. A blizzard warning is in effect until tomorrow afternoon for the mountains of Los Angeles, Ventura, Santa Barbara and San Bernardino Counties.

Several inches of rain were expected to fall along the coasts and valleys, and the heaviest snow, up to seven feet, was forecast in areas of high elevation. The storm has snarled transportation, causing flight delays and road closures. Drivers were advised to use chains on their tires.

Some areas could see their first measurable snowfall in decades. Here are maps tracking the storm, and photos of the California snow.

In Michigan, more than 700,000 customers remained without electricity after snow, freezing rain and heavy wind helped bring down power lines.

3. Inflation may be speeding back up.

The Federal Reserve’s preferred measure of inflation unexpectedly sped up last month, underscoring the challenge facing central bankers as they try to rein in price increases.

The measure, the Personal Consumption Expenditures price index, was up 5.4 percent in January from a year earlier, the Commerce Department said. That was up from 5.3 percent in December. The figures are the latest evidence that neither price increases nor the broader economy are cooling as much as expected, and they raise the question as to whether the Fed will need to do even more to bring inflation to heel.

The S&P 500 fell by more than 1 percent today, concluding its worst week of the year.

4. Nigerians head to the polls tomorrow in a crucial presidential election.

The race is considered to be one of the most important elections happening anywhere in the world this year. Not since the rebirth of Nigeria’s democracy in 1999 has the country faced an election as nail-biting — and as wide open — as this one.

Many Nigerians see the country as being at a potential inflection point. With more than 60 percent of the country in poverty, and a plague of kidnappings terrorizing its residents, some voters are planning to break with the two traditional parties to vote for a surprise third-party challenger.

5. The Ohio train derailment is putting J.D. Vance in the spotlight for the first time since he became a senator.

When Donald Trump traveled to East Palestine, Ohio, this week to visit the scene of the derailment, and to criticize the Biden administration for its response, Vance was the one Washington figure the former president singled out with praise.

The incident, which caused fear and frustration among locals, was the first major crisis in the freshman senator’s tenure. Vance has used it as an opportunity to tap into a theme that first brought national attention to his Senate ambitions: speaking up for working-class Ohioans who he has suggested have been victimized by the politics of the left.

6. Baseball is back, and it looks different.

M.L.B. held its first spring training games of the year this afternoon, giving players a chance to shake off off-season rust in the comfortable weather of Arizona and Florida. But more important, players will have to adapt to some of the most significant reforms in the sport’s history.

The biggest shift is the creation of a pitch clock: Pitchers will have only 15 seconds to throw the ball when the bases are empty. Other changes, including a ban on defensive shifts, larger bases and a limit on pickoff attempts, will also take some getting used to.

For more: The Yankees are now paying Aaron Judge $40 million per year. Can he repeat last year’s performance?

7. With so much of our lives on our computers, digital clutter can become overwhelming.

Many of us don’t realize just how much data we have accumulated on our devices until we hit a limit or we need to find something hidden among the mess. And while the clutter may be digital, the anxiety it induces is real.

We talked to experts about decluttering our digital lives. They suggested cleaning in bursts and organizing what’s left into easily identifiable folders. They also advised tackling photos, which are often filled with cherished memories, last.

For more cleaning tips: Here’s a guide to when it’s best to swap out different household items.

8. From Moscow to the Met.

A new staging of Wagner’s “Lohengrin,” led by the tenor Piotr Beczala, will arrive at the Metropolitan Opera on Sunday after a tumultuous year.

The performance, developed in scattered homes and studios during the coronavirus pandemic, premiered last year in Moscow on Feb. 24 — the day Russia invaded Ukraine. The show went on, and was greeted by cheering ovations, but the director fled the country within days. Now, a year later — and with a set rebuilt from scratch — it’s ready for audiences again.

Also this weekend, the Screen Actors Guild Awards will be handed out on Sunday. Here are the nominees.

9. Could you squeeze your life into 450 square feet?

Michael Ingram Jones did when he moved from San Francisco to a prewar apartment housed in the West Village of New York City. He hired an architecture firm to help him make the most of every inch — including placing his bed smack in the middle of the room.

If you’re looking for a studio yourself, here are the most (and least) affordable cities to rent.

Also in the West Village, four local newspapers are vying for supremacy. It’s become vicious.

10. And finally, the sound of dinosaurs.

Blockbuster movies have left millions of viewers with the impression that dinosaurs once roamed the world roaring like lions.

But new research suggests that they may have sounded more like modern-day birds. While very little is understood about dinosaur vocals, scientists have drawn clues from what might be the first known fossilized larynx of a dinosaur. The larynx, from a spiky ankylosaur, suggests that the dinosaur could open its airway wide to make loud calls that could be heard far away.

Have an unexpected night.

Elizabeth Bristow compiled photos for this briefing.

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