The search for 45-year-old Michael Brown, the suspect accused of shooting and killing four people at a Montana bar, intensified on Sunday as authorities revealed the victims' identities. NBC News' Kathy Park has the latest. Air quality alerts from Canadian wildfire smoke spread to the Northeast on Sunday, stretching as far as northern Maine. It comes as dry conditions fuel several wildfires out west, including the Gifford Fire, which grew to roughly 40,000 acres so far. NBC News' Maggie Vespa has the latest. President Trump's new import taxes on multiple countries, including Canada and Brazil, are set to take effect this week, with consumers and small businesses in the U.S. now bracing to pay higher prices for goods and services. NBC News' Dana Griffin has more. President Trump's U.S. Special Envoy Steve Witkoff is set to visit Russia this week after the president issued an ultimatum for Russian President Putin, with the goal of achieving a ceasefire agreement for the war in Ukraine by Friday. NBC News' Vaughn Hillyard reports. As the war in Ukraine rages on, drones have become an important weapon for both Ukraine and Russia. Now, the U.S. Army is testing their own drones to prepare for the future of warfare. NBC News' Courtney Kube traveled to Poland for an inside look. In a move to counter Republican redistricting in Texas, dozens of Democrats in the state House of Representatives are heading to Illinois on Sunday to deny a necessary quorum for the GOP to move forward with those efforts to add more Republican House seats in Congress. NBC News' Ryan Chandler has the latest. As millions of children across the country prepare to go back to school, cases of the highly contagious whooping cough are spreading rapidly. It comes as new data from the CDC reveals that a record number of children got vaccine exemptions for school. NBC News' Maya Eaglin has more.  Pope Leo XIV celebrated mass on Sunday with more than 1 million young Catholics from around the world, marking the biggest event for the pontiff since he was elected. NBC News' Claudio Lavanga reports from Rome. At Lehigh Valley Hospital in Pennsylvania, a group of eight "float" nurses, who float across different emergency departments, built a strong bond and support system after they all became pregnant within months of each other. NBC News' Hallie Jackson has the story. 

In a wide-ranging interview on CNBC, the President said he could raise his looming 25% tariff on India even higher because of that country's insistence on buying Russian oil. NBC News' Garrett Haake reports. NBC News' Liz Kreutz reports from Los Padres National Forest where the largest fire in California is burning out of control. Multiple wildfires continue to burn in other parts of the country and smoke from the Canada wildfires prompted air quality alerts in at least a dozen states today. Lawyers for Ghislaine Maxwell filed a request to block the government's efforts to release grand jury transcripts in the investigation of Jeffrey Epstein. Meanwhile, a House Committee subpoenaed a group of prominent national figures to testify about Epstein, including Bill and Hillary Clinton. NBC News' Kelly O'Donnell reports. In Jackson, Tennessee, a suspected killer was arrested this morning after officials say they received multiple calls from residents. Police released surveillance video showing the suspect armed with a rifle and wearing camouflage. NBC News' Priya Sridhar reports from the scene. On August 6, 1945, the U.S. dropped the first atomic weapon of war on the Japanese city of Hiroshima, killing tens of thousands of people. 80 years later, NBC News' Janis Mackey Frayer travelled to Hiroshima to visit the city's Peace Memorial Park and to speak with survivors about the lasting impact. There's good news tonight about a rescue in Baltimore that saved a man's life. Police officers were patrolling city pools in their helicopter when they received a call about a drowning victim. After an emergency landing, the officers quickly acted. Breana Ross from our NBC affiliate in Baltimore reports.