RENO, NV — None of the eight people who died last month after a 28-foot power boat capsized on Lake Tahoe during a sudden storm were wearing life vests, the National Transportation Safety Board said in a preliminary report. Ten people, including the boat's operator, were on board a privately owned Chris-Craft vessel on June 21 when a sudden storm hit, bringing high winds, 8- to 10-foot waves, and marble-sized hail, according to the National Transportation Safety Board report released on July 23.