richest people worth $4 billion by 25. but it didn't come without a cost. zuckerberg's former classmates, identical twins tyler and cameron, sued him in 2004, saying they hires the computer product did for help with their social networking site months before facebook launches but zuckerberg decided to steal their ideas and the business plan, and to launch his own website. >> wait a second. isn't this the exact project we were working on? isn't this the exact person we were working on it with? >> reporter: the twins, olympic rowers getting mbas in exland, settled the das in 2008 for $65 million, part of it in facebook stock. but now, the twins want the settlement vacated claiming they were misled about the company's value. >> i'm sure $65 million wouldn't seem like a lot because they believe they effectively created facebook which is worth more than that. >> reporter: facebook tells nbc