Alberto Ibargüen, publisher of The Miami Herald, has been named chairman of the board at PBS, the governing body for the nation’s public broadcasting stations. As chairman, Ibargüen said, his challenge will be to draw on the PBS heritage while preparing for a rapidly changing future. ‘The issue is not so much PBS’ going out of business tomorrow, but, in a world of tightening budgets, finding ways to keep PBS as sharp as it needs to be.'”