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By Jamie Ross Listen to this briefing Good morning. It’s Wednesday, March 12, and if economic turbulence is making you panic about your retirement savings, our personal financial columnist has some advice here. Let’s start with the latest news. President Donald Trump reversed a threat to double tariffs on Canadian steel. A wild day: Trump said yesterday that he would double the tariffs, setting off a new wave of selling on Wall Street. A few hours later, he said he “probably” would not go ahead. Confused? So are a lot of business leaders. Some Republicans are (gently) urging Trump to rethink his controversial tariffs. Today, new inflation numbers are set to add to economic concerns. Read this story          Ukraine agreed to a U.S. ceasefire proposal aimed at ending the war with Russia. What to know: The deal resulted from meetings between U.S. and Ukrainian officials in Saudi Arabia. In return, the U.S. lifted its freeze on military and intelligence support. What now? It’s unclear whether Russia will accept the ceasefire. But the agreement lessens a divide between U.S. and European allies that had grown wide. Read this story          The Education Department is laying off about half its staff. Why? It’s part of Trump’s goal of shrinking the federal role in education. Separately, a division in charge of preserving about 26,000 U.S. artworks is also being slashed. What’s being lost with the government job cuts? These fired feds can tell you. In other news: USAID workers were ordered to shred and burn documents. And, yesterday, Trump and Elon Musk turned the White House lawn into a lot for the Tesla CEO’s cars. Read this story          House Republicans passed a bill to avert a government shutdown. What to know: The bill, which would lead to $1 billion in D.C. cuts, narrowly passed yesterday — see how your lawmaker voted here. It will need Senate Democrats’ votes to become law. Also in Congress: A Republican lawmaker repeatedly misgendered Rep. Sarah McBride (D-Delaware) at a House hearing. McBride is the first openly transgender member of Congress. Read this story          A measles outbreak is spreading across the country. The latest: More than 200 cases of the highly infectious diseasehave been reported in several states. The alarm centers on New Mexico and Texas, where vaccine resistance has hardened. In other health news: In one of his first moves as health secretary, Robert F. Kennedy Jr. is seeking to tighten a loophole that allows chemicals in the U.S. food supply. Read this story          Southwest is ending its trademark “bags fly free” policy for many passengers. Be prepared: Bag charges will apply to flights booked on or after May 28, the airline said yesterday. People with loyalty status will still be able to check one or two bags for free. Customers are outraged: Southwest’s quirks and perks were much loved, especially its “Hunger Games” open seating policy. But it’s ditching much of what made it special. Read this story          ADVERTISEMENT   Police identified a surprising probable cause of Long Island’s major brush fires. Authorities respond in Westhampton, New York, on Saturday. (Sarah Mckerna/New York Air National Guard/EPA-EFE/Shutterstock) Over the weekend: Several fires spread through parts of Long Island, burning about 600 acres and prompting a state of emergency. Most were under control by Sunday. So, what happened? The fires are believed to have been accidentally started by a resident making s’mores. A fire lit up their backyard, then embers sparked other blazes.   Read this story          Before you go … caffeine can boost your alertness: Follow these science-backed tips. Plus: Do you get ear pain? Here’s what to do. One more good read: Europe wants healthier cities. That means fewer cars. And finally … test your news knowledge with The Post’s daily quiz, On the Record. Click here to play. Or try our word games, Keyword and the brand-new Wridges. You’re all caught up. See you tomorrow.