6 PM ET: Harris’ presidential bid, cancelled Delta flights, new Gaza evacuations & more

Vice President Kamala Harris is marching to the Democratic nomination as she rallies more support from within the party. The head of the Secret Service faced off with lawmakers at a congressional hearing over the assassination attempt against former President Donald Trump. Some Delta passengers are experiencing a travel nightmare at the world’s busiest airport. Israeli strikes near a southern Gaza city killed dozens in the military’s latest assault. Plus, the White House laid out some strategies to help parents talk to their children about staying safe on social media.

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