By Jamie Ross and Hannah Jewell  Email Listen to this briefing Good morning. It’s Monday, Oct. 28, and it’s hard to see someone else living out our dreams — meet the man who walked 38 dogs at once. Now let’s get to the news. Speakers used racist insults at Donald Trump’s rally in New York last night. One example: Comedian Tony Hinchcliffe called Puerto Rico an “island of garbage.” It sparked outrage, and came moments before Puerto Rican star Bad Bunny endorsed Kamala Harris. In related news: JD Vance defended Trump’s vow to use the U.S. military against some Americans. And, at Trump’s events, vulgar T-shirts insulting Harris are in demand. Read this story            Harris is stepping up her attacks on Trump’s age and competence. How? She’s echoing some of the taunts Trump used to direct at President Joe Biden. During a visit to Philadelphia yesterday, she launched a new ad called “Philly vs. Trump.” What else to know: The presidential polls have continued to tighten. We asked Trump and Harris supporters how they would handle defeat — the contrasts were illuminating. Read this story            Elon Musk denied having worked in the U.S. illegally. Why? It followed a Post report that said Musk lacked the legal statusto build a start-up in the 1990s. Biden used the report to attack the billionaire, who is campaigning for Trump. The bigger picture: Other billionaires and business leaders are staying quiet on Trump. At The Post: Amazon founder Jeff Bezos decided the paper, which he owns, will no longer endorse presidential candidates. The surprise announcement angered subscribers and journalists. Read this story              Israel hit military targets in Iran on Saturday. What happened? The attack targeted Iranian missile capabilities and achieved “all its objectives,” Israel said. Israeli and Iranian officials described the strikes as limited. Zooming out: Iran and Israel have long fought a shadow war in the Middle East. But, since April, both countries have launched direct strikes on each other’s territory. Read this story            Climate change is melting arctic ice — fueling a tourism boom. A hike to the ice caves of Longyearbreen, a glacier in Svalbard, Norway. (Paolo Verzone/Agence VU) Why? Boats can now reach previously unreachable places. Cruise trips have doubled from Svalbard, Norway, since 2016, as travelers hope to see glaciers and wildlife. It won’t last long: The Arctic is warming faster than almost anywhere else on the planet. And long-distance travel is helping melt the attractions tourists hope to see there. Read this story            ADVERTISEMENT     Vaccines could help reduce the need for antibiotics. The problem: Pathogens, fungi, bacteria and viruses can stop responding to antimicrobial medications. Up to 5 million deaths in 2019 could be attributed to this resistance. One solution: Vaccines against just 23 pathogens could reduce the number of antibiotics needed by 22% globally per year, a recent World Health Organization report found. Read this story            A medieval saga told of a man thrown in a well, and he may have been found. The remains were found in this well at Sverresborg castle in central Norway. (Norwegian Institute for Cultural Heritage Research) About 800 years ago: A story made a glancing mention of a dead man tossed in a drinking well after a raid on a castle in Norway. In the text, the poor guy doesn’t even get a name. What’s new? Scientists carried out tests on a skeleton found decades ago at the bottom of a well near a castle. They claim he’s the “Well-man” briefly mentioned in the 182-verse story. Read this story