It was a spasm of violence that stunned residents: some 200 black youths raising hell - what police called a full-blown riot - in Austin, Texas. Angry black youths inexplicably converged by the Highland Mall, near an iconic haunted house attraction, and walked atop parked cars, fought among themselves, and hurled rocks at some 30 arriving police officers. Several people, including one officer, suffered minor injuries. Later, police said so many squad cars were need that the department was unable to provide adequate 911 emergency coverage to the rest of Austin. There were no reports of black-on-white violence, to be...