Tuesday on the News Hour, Minnesota Gov. Tim Walz joins the Democratic ticket as Kamala Harris' vice presidential pick. We look at how he could bolster support in the Midwest. Tropical Storm Debby stalls over the Southeast, dumping torrential rains on Georgia and the Carolinas. Plus, 140 stars over 50 years, the wall that memorializes CIA members who are rarely recognized publicly. PBS News is supported by - https://www.pbs.org/newshour/about/funders