A.M. Edition for Dec. 15. Australia’s prime minister Anthony Albanese is vowing tougher gun laws after a father and son targeted a Hanukkah celebration in Sydney, killing 15 people.    Plus, Chileans elected their most right-wing president since the end of Pinochet’s brutal military dictatorship in 1990, giving President Trump another South American ally. And Elon Musk’s rocket and satellite company SpaceX launches a Wall Street bake-off to hire banks for a possible IPO next year. Luke Vargas hosts. Sign up for the WSJ’s free What’s News newsletter. Learn more about your ad choices. Visit megaphone.fm/adchoices