ABC World News Tonight with David Muir S2024E229 - Episode 229

With former Pres. Barack Obama and former first lady Michelle Obama expected to take center stage on day two of the DNC and make their case for their longtime-friend, Vice Pres. Kamala Harris, Mary Bruce reports from the convention in Chicago, and Rachel Scott reports on former Pres. Donald Trump's counterprogramming in the battleground state of Michigan; James Longman reports on the chilling video that shows the moment a superyacht rapidly sunk off the coast of Sicily with 22 passengers aboard, including two Americans who are still unaccounted for; Trevor Ault has details on the FAA ordering new safety inspections for pilot seats on Boeing 787 jets after a string of concerning incidents; and more on tonight's broadcast of World News Tonight with David Muir.