If they’re wise, the three mystery winners of the world-record $1.6 billion Powerball jackpot will talk seriously with experts in tax law, financial planning, privacy, security and other safeguards before they become known around the planet. The lucky trio did not immediately identify themselves, but they bought their tickets in the small working class town of Munford, Tennessee; in the quiet Los Angeles suburb of Chino Hills; and at a supermarket in affluent Melbourne Beach, on Florida’s Space Coast.