Rachel Scott reports on Minnesota Gov. Tim Walz's first solo appearance on the campaign trail, where he defended himself against the Trump campaign's attacks on his military record; Faith Abubey has the latest on the urgent manhunt underway in North Carolina for a convicted killer who escaped prison guards in a hospital parking lot; as Ukrainian forces advance inside Russia, Ian Pannell reports on the new images believed to show Russian troops being held as prisoners; and more on tonight's broadcast of World News Tonight with David Muir.