New York is stepping up security across the state in the wake of the assassination attempt on former President Donald Trump. Plus, two New York Republicans have snagged speaking roles at this week's Republican National Convention. Also, another brutal heat wave is rolling through the region. And finally, WNYC’s Michael Hill and Jon Campbell discuss a series of emails obtained by WNYC giving a behind-the-scenes glimpse of chaotic days in 2022 when the state of Texas started sending migrants to New York City by the busload.