Good morning. We’re covering new mask rules in Europe, Biden’s moves to fight climate change and harsh detention conditions for asylum seekers in Australia. | | By Melina Delkic | | Passengers wearing protective face masks in Berlin. Requirements on public transportation tightened this week. Stefanie Loos/Agence France-Presse — Getty Images | | Starting this week in Germany, N95 or surgical-grade masks are compulsory for people on public transportation, in office spaces and in shops. The higher-grade mask will also become mandatory in Austria, and France could follow, despite criticism that the more expensive N95 will be out of reach for many low-income earners. | | “We have to slow the spread of this variant. That means we cannot wait until the danger is palpable,” Chancellor Angela Merkel said. Effectively, the German authorities are trying to buy time by slowing the spread of the new variant long enough for the weather to warm and for the number of people vaccinated to increase, Ms. Merkel said. | | Global context: The more contagious variant discovered in Britain has been found in 60 countries, but it remains unclear how it spreads, and whether it has already contributed to countries’ surges. | | President Biden signed a letter to the United Nations on rejoining the Paris climate agreement. Doug Mills/The New York Times | | The return to the international climate agreement, which has 200 signatories, puts the U.S. back on track to keep up with countries like China and France in their commitments to slash planet-warming emissions. It’s a significant move as the U.S. is the world’s second-worst emitter of carbon after China. (Here’s a refresher on what the agreement does and what re-entry means.) | | “No president has brought in this many people at the start of an administration to work on climate change,” Lisa Friedman, who covers climate policy, told our colleagues at The Morning. Still, there are many more big steps necessary to confront global warming, and Republicans plan to push back on many of Mr. Biden’s new climate policies. | | Diplomacy: Experts say Mr. Biden will be more visible and active on the world stage than many expect, even as he grapples with the pandemic, a huge economic recovery effort and the deep divisions left by the Trump era. | | The headquarters of Radio Free Europe/Radio Liberty in Prague, in a photograph released by Russian state media. Alexey Vitvitsky/Sputnik, via Associated Press | | The Russian government is threatening Radio Free Europe/Radio Liberty with multimillion-dollar fines and possible criminal charges. Its editors fear that they will be forced to shut down in the country for the first time since the collapse of the Soviet Union. | | With public discontent growing in Russia, widely available content that criticizes the Kremlin has become a problem for President Vladimir Putin. The outlet has invested in coverage of the Belarus protests, for example. | | Context: The government’s escalation in its pressure campaign against the news outlet shows how Mr. Putin is raising the stakes in his conflict with Washington just as President Biden takes office. | | Details: RFE/RL says the government has in recent weeks notified it of dozens of violations of new requirements that it label all of its content as being produced by a “foreign agent.” Editors say doing so would damage credibility. | | When Gottlieb’s Bakery, above, reopened in Savannah, Ga., after shutting its doors in 1994, Herbert Buchsbaum, a Times editor, rediscovered a taste of his childhood: a sandwich on the bakery’s tangy, chewy rye. | | “A morsel of madeleine in a spoonful of tea evokes a childhood in a French village,” he writes. “A bite of rye with Dijon mustard calls up mine in Savannah.” But that link to the past shattered with a pandemic, and a death. | | PAID POST: A MESSAGE FROM CAMPAIGN MONITOR | TEST: Email Marketing 101: Never Sacrifice Beauty for Simplicity | A drag-and-drop email builder, a gallery of templates and turnkey designs, personalized customer journeys, and engagement segments. It's everything you need to create stunning, results-driven email campaigns in minutes. And with Campaign Monitor, you have access to it all, along with award-winning support around the clock. It's beautiful email marketing done simply. | | Learn More | | | Australia detention: Dozens of refugees and asylum seekers have been held in hotels in Melbourne for the past year, often with only an hour spent outside their rooms daily. Two detainees have tried to commit suicide, according to activists, and many were shellshocked when they were finally released this week. | | Iraq bomb attack: Two suicide bombers detonated explosive vests in a crowded market in central Baghdad on Thursday morning, killing at least 32 people in the biggest such attack in several years. | | Doug Mills/The New York Times | | Snapshot: Above, President Biden and the first lady, Jill Biden, watching the fireworks from the White House. Katy Perry performed her song “Firework” at the end of the Inauguration Day celebrations, in a star-studded virtual event hosted by Tom Hanks. | | Andrew Scrivani for The New York Times | | Cook: Two pantry staples, chickpeas and pasta, come together to give you this hearty fried tagliatelle dish with smoky tomatoes. | | Watch: “The White Tiger,” Ramin Bahrani’s rags-to-riches tale of modern India uses the story of a young businessman’s rise to indict the iniquities of the society that created him. | | Take a break during your hectic day and turn to our At Home collection of ideas on what to read, cook, watch, and do while staying safe at home. | | President Biden is inheriting tricky tech questions, including how to rein in powerful digital superstars, what to do about Chinese technology and how to bring more Americans online. Our OnTech newsletter has this glimpse at the challenges and opportunities in technology policy. | | Restraining tech powers: Under the Trump administration, there were investigations and lawsuits over the power of Google, Facebook, Amazon, Apple and other tech companies. Tech giants can expect more of the same under Mr. Biden and a Congress controlled by Democrats. The new administration is expected to continue lawsuits against Google and Facebook. | | Tech and China: The Trump administration’s fumbling over Chinese apps like TikTok was a missed opportunity to address an important question: What should the U.S. government do about globally important technology from countries that don’t share America’s values? Mr. Biden has expressed support for more government investment in U.S. technology to counter China’s ambitions but hasn’t said much beyond aiming for a more coherent policy. | | What else? Mr. Biden’s economic revival plan includes suggestions to “launch the most ambitious effort ever” to modernize U.S. cyberdefenses. Maybe this is the year for a federal data privacy law? And there are rifts among Democrats on special employment treatment for “gig” workers. | | That’s it for this briefing. See you next time. — Melina | | Thank you Carole Landry helped write this briefing. Theodore Kim and Jahaan Singh provided the break from the news. You can reach the team at briefing@nytimes.com. | | Were you sent this briefing by a friend? Sign up here to get the Morning Briefing. | | |