NEW YORK (AP) - Beverly Sills, the Brooklyn-born opera diva who was a global icon of can-do American culture with her dazzling voice, bubbly personality and management moxie in the arts world, died Monday of cancer, her manager said. She was 78. It had been revealed just last month that Sills was gravely ill with inoperable lung cancer. Sills, who never smoked, died about 9 p.m. Monday at her Manhattan home with her family and doctor at her side, said her manager, Edgar Vincent.