Whit Johnson reports from the scene at Brown University after a deadly shooting leaves two people killed and nine others injured, with a person of interest now in custody; Authorities investigate a mass shooting at Australia's Bondi Beach during a Hanukkah celebration that killed at least a dozen people, calling it a terror attack targeting the Jewish community; ESPN's Herm Edwards breaks down Week 15 of the NFL as playoff spots hang in the balance; and more on ABC's Good Morning America.