By Jamie Ross and Hannah Jewell  Email Listen to this briefing Good morning. It’s Friday, July 26, and if you’re traveling to Europe this summer, here’s how to tip in Italy, France, and other countries. Now let’s get to the news.    A top drug cartel leader was taken into U.S. custody yesterday. Who? Ismael “El Mayo” Zambada Garcia. He was among the U.S. government’s most wanted drug traffickers, and his Sinaloa cartel is considered the top supplier of fentanyl to the U.S. How it happened: He was fooled into boarding a U.S.-bound private plane, an official said, along with a son of infamous drug lord “El Chapo,” who is serving a life sentence in the U.S. Read this story            Kamala Harris is considering about a dozen potential vice-presidential picks. The latest: The vice president has identified three top candidates, The Post reported this morning. She plans to decide by Aug. 7. (Choose your ideal pick with this quiz.) Other news: Barack and Michelle Obama endorsed Harris this morning. She is also being backed by a meme army and “childless cat ladies.” What the polls say: The switch to Harris appears to have slightly improved Democrats’ chances against Donald Trump. Read this story              French train lines were hit by “arson attacks” ahead of the Olympic Opening Ceremonies. The latest: Three train lines were targeted, officials said this morning. It has caused travel chaos hours before the Paris Games officially open. The impact: Around 800,000 travelers may be affected. The Opening Ceremonies are set to start at 1.30 p.m. Eastern. Read this story            Harris called for a cease-fire in Gaza after meeting with Israel’s prime minister. Yesterday: Harris urged Benjamin Netanyahu to accept a cease-fire and hostage release deal. She and President Biden met separately with him at the White House. Zooming out: All eyes are on Harris to see how she handles the Israel-Gaza war — a divisive topic for Democrats. Today, Netanyahu will meet with Trump at his Florida home. Read this story            ADVERTISEMENT     A man was arrested in connection with a huge wildfire in Northern California. What to know: The Park Fire, which grew to more than 145,000 acres overnight, was sparked by a man pushing a flaming car down a gully, authorities said yesterday. Related news: Global temperatures in 2023 were so high, and wildfires were so severe, that forests lost much of their ability to absorb carbon dioxide, a new study found. Read this story            Komodo dragons have iron-coated teeth, scientists discovered. Komodo dragons, which have large, serrated teeth, share a common ancestor with dinosaurs. (Aaron LeBlanc) What for? Ripping apart prey. The endangered lizards, native to Indonesia, can tear apart almost any kind of meat — including 1,000-pound water buffaloes. How it works: Iron-enriched coatings on the serrations and tips of teeth keep them sharp. It could teach us more about how dinosaurs — like T. rex— devoured prey. Read this story            Scientists are very excited about a vein-filled rock discovered on Mars. Why? The rock, found by the Perseverance rover, has marks that on Earth are often associated with past biological activity. NASA revealed the finding yesterday. Is it evidence of ancient life on Mars? It could be — but a closer look is needed before scientists can confirm either way. And Mars rocks have fooled them before. Read this story