Lake Tahoe boating tragedy: Victims completed safety course, but half of California boaters have not

The owners of a power boat that capsized last month at Lake Tahoe during a sudden violent storm, killing eight people in a tragedy that drew national attention, had both completed a boating course and passed a safety exam as required under California state law.

Josh Pickles, 37, of San Francisco, received a state boater card last October, and his father, Terry Pickles, 73, of Redwood City, was issued a state boater card in January, certifying that they successfully passed the mandatory exam...