KNOW IT ALL: Monday's Top Stories at NBC News

Good morning. Here are some of the headlines we're following this morning:

For Subscribers

FOR SUBSCRIBERSAbdul El-Sayed tries to woo MAHA voters as Democrats seek inroads with RFK’s supporters

FOR SUBSCRIBERSKratom-like substances are popping up in a typically benign supplement

FOR SUBSCRIBERSGOP super PAC increases its spending for Sen. Jon Husted in tough Ohio race

FOR SUBSCRIBERSRecords reveal tumultuous marriage between slain New York Times executive and wife

FOR SUBSCRIBERSFrom clean energy warrior to ‘wall of shame,’ James Talarico reverses on a fossil fuel money pledge

FOR SUBSCRIBERSCongressional staff planned official trip with luxury stops in Italy and France weeks before election

FOR SUBSCRIBERSA harrowing ordeal aboard an Israel-bound plane

FOR SUBSCRIBERSOpenAI CEO Sam Altman to skip congressional hearing on rogue AI agents

FOR SUBSCRIBERSKey DOJ lawyers departed Trump ‘grand conspiracy’ probe amid pressure to produce, source says

FOR SUBSCRIBERSTrump’s new AI chatbot often links to a site launched under Clinton 26 years ago

FOR SUBSCRIBERSAt MAHA summit, industry CEOs the movement once vilified take the stage

FOR SUBSCRIBERSThis Paralympian has two goals: Win medals and give away $500,000 to her teammates

FOR SUBSCRIBERSCornell rape allegation spotlights stringent New York state laws that have long drawn criticism

FOR SUBSCRIBERSThe debate over AI’s future rages on both coasts

FOR SUBSCRIBERSDecades-old march dispute reignites in Northern Ireland, threatening political crisis

For Subscribers

FOR SUBSCRIBERSAbdul El-Sayed tries to woo MAHA voters as Democrats seek inroads with RFK’s supporters

FOR SUBSCRIBERSKratom-like substances are popping up in a typically benign supplement

FOR SUBSCRIBERSGOP super PAC increases its spending for Sen. Jon Husted in tough Ohio race

FOR SUBSCRIBERSRecords reveal tumultuous marriage between slain New York Times executive and wife

FOR SUBSCRIBERSFrom clean energy warrior to ‘wall of shame,’ James Talarico reverses on a fossil fuel money pledge

FOR SUBSCRIBERSCongressional staff planned official trip with luxury stops in Italy and France weeks before election

FOR SUBSCRIBERSA harrowing ordeal aboard an Israel-bound plane

FOR SUBSCRIBERSOpenAI CEO Sam Altman to skip congressional hearing on rogue AI agents

FOR SUBSCRIBERSKey DOJ lawyers departed Trump ‘grand conspiracy’ probe amid pressure to produce, source says

FOR SUBSCRIBERSTrump’s new AI chatbot often links to a site launched under Clinton 26 years ago

FOR SUBSCRIBERSAt MAHA summit, industry CEOs the movement once vilified take the stage

FOR SUBSCRIBERSThis Paralympian has two goals: Win medals and give away $500,000 to her teammates

FOR SUBSCRIBERSCornell rape allegation spotlights stringent New York state laws that have long drawn criticism

FOR SUBSCRIBERSThe debate over AI’s future rages on both coasts

FOR SUBSCRIBERSDecades-old march dispute reignites in Northern Ireland, threatening political crisis

1. Brussels Death Toll Climbs Amid Raids, Remembrance

Brussels was preparing to honor terror victims with an interfaith memorial Monday after a weekend of raids across Europe aimed at signaling stepped-up cooperation following carnage in the Belgian capital. The toll from the bombings climbed to 35 early Monday while several suspects were in custody from Belgium to Italy and the Netherlands, picked up as part of a spree of searches carried out over the weekend. Meanwhile, two more Americans were confirmed dead in the attacks, bringing the American death toll to four. Read more in NEWS.

2. Suicide Attack Kills 72 in Pakistan Park

At least 72 people — mostly women and children — were killed and more than 320 others injured when a suicide bomber blew himself up at a busy park in Lahore on Sunday, officials said. A splinter group of the Pakistani Taliban — Tehreek-e-Taliban Pakistan Jamaatul Ahrar (TTP-JA) — claimed responsibility for the attack. "Members of the Christian community who were celebrating Easter today were our prime target," TTP-JA spokesman Ehsanullah Ehsan told NBC News. Read more in NEWS.

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Deadly Suicide Bomb Rocks Kids' Park

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3. Lawsuit Planned Over N.C. Ban on Transgender Bathrooms

The American Civil Liberties Union, the LGBT activist groups Lambda Legal and Equality NC, and plaintiffs yet to be named said Sunday they will sue to stop North Carolina from enforcing a controversial new law that prevents localities from passing their own anti-discrimination rules for gay and lesbian residents. The law was passed last week by the Republican-controlled General Assembly, which took issue with language in an existing law that allowed transgender people to use restrooms aligned with their gender identities. Read more in NEWS.

4. More Dem Debates? Sanders Wants Another Chance at Clinton

Bernie Sanders, when asked on NBC's Meet the Press this weekend whether he was worried that Hillary Clinton would not debate him anymore, said: "I do have a little bit of concern about that. But I certainly would like to see a debate in New York State." Sanders' comments came on the heels of him sweeping all three Democratic caucuses on Saturday, with decisive victories over Clinton in Washington state, Alaska and Hawaii. Read more in POLITICS.

5. Ivanka Trump Gives Birth to Baby Boy

America gained another member of the Trump clan on Easter Sunday after Donald's daughter gave birth to a baby boy. Ivanka Trump announced the arrival of Theodore James Kushner on Twitter. He is the 34-year-old businesswoman's third child with her real-estate developer husband Jared Kushner, 35. Theodore is Donald Trump's eighth grandchild. Read more in NEWS.

6. Mother Angelica, Founder of Catholic Network EWTN, Dies

Mother Mary Angelica of the Annunciation, founder of the Catholic TV powerhouse EWTN, died Easter Sunday at 92, the network confirmed Sunday night. Mother Angelica — born Rita Antoinette Rizzo in Canton, Ohio, in 1923 — began what would become the Eternal Word Television Network in Irondale, Alabama, in 1981 with $200, 12 nuns and little television experience. Read more in NEWS.

7. 'Batman v Superman' Shatters Records With $170.1 Million Debut

"Batman v Superman: Dawn of Justice" steamrolled past records, debuting to a gargantuan $170.1 million over Easter weekend despite being pilloried by critics. That ranks as the top opening weekend for a DC Comics film, the best March launch ever, and the sixth biggest domestic opening weekend of all-time. Read more in ENTERTAINMENT.

Nightly Spotlight: Exhibit Featuring Art of the Holocaust on Display in Berlin

Nelly Toll was 6 years old when the Nazis invaded her hometown of Poland, but decades later, her work and that of 52 other artists will be on display in Berlin.