Alcoa Chairman Alain Belda and President and CEO Klaus Kleinfeld rang the opening bell on the NYSE this morning in celebration of 50 years on the Dow. (l tor) Larry Leibowitz, EVP, NYSE Euronext; Alcoa CFO Chuck McLane; Alain Belda; Klaus Kleinfeld; Dr. Richard Hunt, whose family helped found Alcoa; Bruce Cooper, representing Alcoa retirees; Vanessa Lau, representing Alcoa employees worldwide; and Duncan Niederauer, CEO, NYSE Euronext. (Photo: Business Wire)