Silicon Valley's dirty secret - age bias

A look at the pressures in Silicon Valley, where the start-up ethos extols fresh ideas and young programmers willing to toil through the night. Chief executives in their 20s, led by Facebook founder Mark Zuckerberg, are lionized, in part because of their youth. Many investors state bluntly that they prefer to see people under 40 in charge. Yet the youth worship undercuts another of Silicon Valley's cherished ideals: that anyone smart and driven can get ahead in what the industry likes to think of as an egalitarian culture. To many, it looks like simple age discrimination -- and it's affecting people who wouldn't fit any normal definition of old.