Meet Mike Holmgren, Jon Gruden, John Fox, Andy Reid, and Mike Sherman -- top NFL head coaches whose careers rest on their ability to lead other men to win in the fiercely competitive world of professional football. Being an NFL coach is the ultimate high-pressure job. The average life span of a coach is two and a half years, so there is an enormous amount of pressure and scrutiny, from demanding owners, millions of fickle fans, and unyielding...