NBC Nightly News S2026E98 - Apr 18 Sat

In a major reversal, Iran has declared the Strait of Hormuz closed, less than 24 hours after it announced the critical waterway was "completely open." It comes as Iran allegedly opened fire on two ships attempting to pass through the strait. Iran's Revolutionary Guard said the closure is a response to the continuing U.S. Navy blockade on Iranian ports. NBC News' Raf Sanchez has the latest. President Trump said "very good conversations" are taking place with Iran after warning the U.S. may start "dropping bombs again" if no deal is met by next week when the ceasefire with Iran expires. It comes as Iran is declaring the Strait of Hormuz closed in response to the U.S. continuing its blockade of Iranian ports. NBC News' Julie Tsikrin reports. More than three dozen tornadoes have been reported in seven states, causing major destruction as severe weather continues to batter the Midwest. NBC News' Sam Brock reports. With the busy summer travel season approaching, there are growing concerns that air travel costs are already skyrocketing. And with jet fuel costs rising due to the war with Iran, costs are expected to rise even more. NBC News' Ryan Chandler reports. The Los Angeles Police Department says actor Dylan Sprouse confronted a suspected burglar, tackling the trespasser on his front lawn and holding him until officers arrived. NBC News' Dana Griffin reports. With the busy summer travel season approaching, there are growing concerns that air travel costs are already skyrocketing. And with jet fuel costs rising due to the war with Iran, costs are expected to rise even more. NBC News' Ryan Chandler reports. New data finds an experimental cancer treatment is showing major promise. Our team spoke with the first person to receive a personalized mRNA vaccine for pancreatic cancer at Memorial Sloan Kettering, who has now been cancer-free for six years. NBC News' Anne Thompson has a closer look at how it works. NBA players were asked to name someone from their childhood outside their family who had a significant impact on their lives. The players and the heroes they named then had a surprise reunion in the NBC Local series "Launching Legends." NBC News' José Díaz-Balart has the story.