The New York TimesBy . Last year at its annual gala, LaGuardia Community College, arguably the most ethnically diverse college in the country, honored Marilyn Skony Stamm, the chief executive of a global heating and air-conditioning business. A child of the South Side of Chicago who had gone to Northwestern on scholarship, Ms. Stamm maintained a committed interest in education and joined LaGuardia’s foundation board six years ago, proving herself a skilled networker for an institution with minimal capacity for soliciting money. More...