Jay O'Brien reports on HHS Secretary Robert F. Kennedy Jr. defending himself as frustrated lawmakers from both parties demanded answers on whether he’s trying to limit Americans’ access to vaccines – and firing top health officials who stand in his way; Kayna Whitworth reports on the pursuit and arrest of a domestic violence suspect prompted by a woman, who police say, used a hand signal in a convenience store to ask for help; Matt Gutman looks back at the life and legacy of legendary Italian designer Giorgio Armani, who died at age 91, and how he redefined the fashion industry; and more on tonight’s broadcast of World News Tonight with David Muir. 00:00 Intro 02:07 RFK Jr. grilled by Democratic and Republican lawmakers on U.S. vaccine policies 06:43 American among 16 dead in tragic Lisbon streetcar crash 08:44 Massive wildfire outside Yosemite burning out of control 10:30 Tracking the paths of Hurricane Kiko and Tropical Storm Lorena 11:10 Domestic violence suspect arrested after wo...