George Steinbrenner, whose big wallet and win-at-all-cost attitude whipped the New York Yankees into a billion-dollar sports empire, died Tuesday morning. He had just celebrated his 80th birthday July 4. Steinbrenner had a heart attack, was taken to St. Joseph's Hospital in Tampa, Fla., and died at about 6:30 a.m, a person close to the owner told The Associated Press.