Alliant Techsystems yesterday announced major changes to its senior leadership following the sudden resignation of company President Scott Meyers. "Two major acquisitions over the past year have doubled the size of the company and made our legacy propulsion and ammunition businesses world leaders," ATK Chairman and Chief Executive Officer Paul David Miller said in a statement. "Accordingly, the board of directors has concurred in a new business structure that includes a third operating group, which will pursue new precision systems...