Australian authorities fatally shot a teenage boy after he stabbed and injured a man in what officials believe was likely a terrorist attack. The teen assailant, described as a 16-year-old Caucasian male, was armed with a knife during the attack in a suburb of Perth, said Western Australia Premier Roger Cook. The attack “has the hallmarks” of a terrorist act, said regional police commissioner Col Blanch, who emphasized that it “meets the criteria or at least the definition” of terrorism. Another 16-year-old boy was arrested last month after police said he stabbed and seriously injured a bishop…